Dosing & Uses
Dosage Forms & Strengths
trastuzumab/hyaluronidase
injectable solution, single-dose vial
- (120mg/2,000 units)/mL
- Ready-to-use SC solution contains trastuzumab and hyaluronidase human
Adjuvant Breast Cancer
Indicated for adjuvant treatment of HER2-overexpressing breast cancer for the following:
In combination with doxorubicin, cyclophosphamide, and either paclitaxel or docetaxel OR
In combination with docetaxel and carboplatin OR
As a single agent following multimodality anthracycline-based therapy
600 mg trastuzumab/10,000 units hyaluronidase SC q3Weeks
Continue treatment for 52 weeks or until disease recurrence, whichever occurs first; extending treatment in adjuvant breast cancer >1 year is not recommended
Metastatic Breast Cancer
Indicated for HER2-overexpressing metastatic breast cancer in combination with paclitaxel for first-line treatment or as a single agent in patients who have received ≥1 chemotherapy regimens for metastatic disease
600 mg trastuzumab/10,000 units hyaluronidase SC q3Weeks
Continue until disease progression
Dosage Modifications
Cardiomyopathy
Withhold dose for ≥4 weeks
- ≥16% absolute decrease in left ventricular ejection fraction (LVEF) from baseline
- LVEF below institutional limits of normal and ≥10% absolute decrease in LVEF from baseline
- Resume if, within 4−8 weeks, LVEF returns to normal limits and absolute decrease from baseline is ≤15%
Permanently discontinue
- Persistent (>8 weeks) LVEF decline
- Withheld dose on >3 occurrences for cardiomyopathy
Dosing Considerations
No loading dose is required
No dose adjustments for body weight or for different concomitant chemotherapy regimens are required
Do not substitute trastuzumab/hyaluronidase for or with ado-trastuzumab emtansine
Cardiac monitoring
- Conduct thorough cardiac assessment (eg, history, physical examination, and determination of LVEF by echocardiogram, multigated acquisition scan)
- Baseline LVEF measurement immediately prior to initiation
- LVEF measurements q3Months during and upon completion of treatment
- Repeat LVEF measurement at 4-week intervals if dose is withheld
- LVEF measurements q6Months for ≥2 yr following completion of trastuzumab/hyaluronidase as a component of adjuvant therapy
Patient selection
- Select patients based on an FDA-approved companion diagnostic for trastuzumab
- Assess HER2 protein overexpression and HER2 gene amplification using FDA-approved tests specific for breast cancer by laboratories with demonstrated proficiency
- Information on FDA-approved tests for detecting HER2 protein overexpression and HER2 gene amplification is available at: http://www.fda.gov/CompanionDiagnostics
Safety and efficacy not established
In patients receiving IV trastuzumab, risk of cardiac dysfunction was increased in geriatric patients as compared with younger patients, in both those receiving treatment for adjuvant therapy or metastatic disease
Interactions
Interaction Checker
No Results
Contraindicated
Serious - Use Alternative
Significant - Monitor Closely
Minor
Contraindicated (0)
Serious - Use Alternative (3)
- axicabtagene ciloleucel
trastuzumab, axicabtagene ciloleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug.
- beclomethasone, inhaled
beclomethasone, inhaled will decrease the level or effect of hyaluronidase by unspecified interaction mechanism. Avoid or Use Alternate Drug. Larger hyaluronidase doses may be required to achieve desired effect
- brexucabtagene autoleucel
trastuzumab, brexucabtagene autoleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug.
Monitor Closely (182)
- abatacept
trastuzumab, abatacept. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- abemaciclib
trastuzumab, abemaciclib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- acalabrutinib
trastuzumab, acalabrutinib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- ado-trastuzumab emtansine
trastuzumab, ado-trastuzumab emtansine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- alemtuzumab
trastuzumab, alemtuzumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- alprazolam
hyaluronidase, alprazolam. Other (see comment). Use Caution/Monitor. Comment: Drug combination has been found to be incompatible.
- anakinra
trastuzumab, anakinra. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- antithymocyte globulin equine
trastuzumab, antithymocyte globulin equine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- antithymocyte globulin rabbit
trastuzumab, antithymocyte globulin rabbit. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- articaine
hyaluronidase, articaine. Other (see comment). Use Caution/Monitor. Comment: Hyaluronidase hastens the onset of local analgesia and reduces swelling, but increases systemic absorption of anesthetic. This decreases the duration of action and increases incidence of systemic reaction.
- aspirin
aspirin decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Salicylates, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- aspirin rectal
aspirin rectal decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Salicylates, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- aspirin/citric acid/sodium bicarbonate
aspirin/citric acid/sodium bicarbonate decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Salicylates, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- azacitidine
trastuzumab, azacitidine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- azathioprine
trastuzumab, azathioprine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- azelastine
azelastine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- baricitinib
trastuzumab, baricitinib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- basiliximab
trastuzumab, basiliximab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- bazedoxifene/conjugated estrogens
bazedoxifene/conjugated estrogens decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Enhanced tissue resistance to hyaluronidase.
- beclomethasone, inhaled
trastuzumab, beclomethasone, inhaled. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- beclomethasone, intranasal
trastuzumab, beclomethasone, intranasal. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- belatacept
trastuzumab, belatacept. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- belimumab
trastuzumab, belimumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- betamethasone
trastuzumab, betamethasone. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- bleomycin
trastuzumab, bleomycin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- blinatumomab
trastuzumab, blinatumomab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- brentuximab vedotin
trastuzumab, brentuximab vedotin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- brodalumab
trastuzumab, brodalumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- brompheniramine
brompheniramine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- budesonide
trastuzumab, budesonide. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- busulfan
trastuzumab, busulfan. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- cabazitaxel
trastuzumab, cabazitaxel. Either increases levels of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- canakinumab
trastuzumab, canakinumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- capecitabine
trastuzumab, capecitabine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- carbinoxamine
carbinoxamine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- carboplatin
trastuzumab, carboplatin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- carmustine
trastuzumab, carmustine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- certolizumab pegol
trastuzumab, certolizumab pegol. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- cetirizine
cetirizine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect. .
- chlorambucil
trastuzumab, chlorambucil. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- chloroprocaine
hyaluronidase, chloroprocaine. Other (see comment). Use Caution/Monitor. Comment: Hyaluronidase hastens the onset of local analgesia and reduces swelling, but increases systemic absorption of anesthetic. This decreases the duration of action and increases incidence of systemic reaction.
- chlorpheniramine
chlorpheniramine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- choline magnesium trisalicylate
choline magnesium trisalicylate decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Salicylates, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect. .
- cisplatin
trastuzumab, cisplatin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- cladribine
trastuzumab, cladribine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- clemastine
clemastine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- clofarabine
trastuzumab, clofarabine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- clonazepam
hyaluronidase, clonazepam. Other (see comment). Use Caution/Monitor. Comment: Drug combination has been found to be incompatible.
- conjugated estrogens
conjugated estrogens decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Enhanced tissue resistance to hyaluronidase.
- conjugated estrogens, vaginal
conjugated estrogens, vaginal decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Enhanced tissue resistance to hyaluronidase.
- copanlisib
trastuzumab, copanlisib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- corticotropin
corticotropin decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Corticotropin (ACTH), when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect. .
trastuzumab, corticotropin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. . - cortisone
cortisone decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Cortisone, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect. .
trastuzumab, cortisone. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. . - cyclizine
cyclizine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- cyclophosphamide
trastuzumab, cyclophosphamide. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- cyclosporine
trastuzumab, cyclosporine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- cyproheptadine
cyproheptadine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- cytarabine
trastuzumab, cytarabine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- dacarbazine
trastuzumab, dacarbazine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- dactinomycin
trastuzumab, dactinomycin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- dasatinib
trastuzumab, dasatinib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- daunorubicin
trastuzumab, daunorubicin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- deflazacort
trastuzumab, deflazacort. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- dengue vaccine
trastuzumab decreases effects of dengue vaccine by immunosuppressive effects; risk of infection. Use Caution/Monitor. Immunosuppressive therapies (eg, irradiation, antimetabolites, alkylating agents, cytotoxic drugs, corticosteroids [greater than physiologic doses]) may reduce immune response to dengue vaccine.
- dexamethasone
trastuzumab, dexamethasone. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- dexbrompheniramine
dexbrompheniramine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect. .
- dexchlorpheniramine
dexchlorpheniramine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- diazepam
hyaluronidase, diazepam. Other (see comment). Use Caution/Monitor. Comment: Drug combination has been found to be incompatible.
- diflunisal
diflunisal decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Salicylates, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect. .
- dimenhydrinate
dimenhydrinate decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- dinutuximab
trastuzumab, dinutuximab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- diphenhydramine
diphenhydramine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- docetaxel
trastuzumab, docetaxel. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- doxorubicin
trastuzumab, doxorubicin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- doxorubicin liposomal
trastuzumab, doxorubicin liposomal. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- doxylamine
doxylamine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect. .
- duvelisib
trastuzumab, duvelisib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- eculizumab
trastuzumab, eculizumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- efgartigimod alfa
efgartigimod alfa will decrease the level or effect of trastuzumab by receptor binding competition. Use Caution/Monitor. Coadministration of efgartigimod with medications that bind to the human neonatal Fc receptor may lower systemic exposures and effectiveness of such medications. Closely monitor for reduced effectiveness of medications that bind to the human neonatal Fc receptor. If long-term use of such medications is essential, consider discontinuing efgartigimod and using alternative therapies.
- elotuzumab
trastuzumab, elotuzumab. Either increases levels of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- emapalumab
trastuzumab, emapalumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- epirubicin
trastuzumab, epirubicin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- estradiol
estradiol decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Estrogens, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- estramustine
trastuzumab, estramustine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- estrogens conjugated synthetic
estrogens conjugated synthetic decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Estrogens, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- estrogens esterified
estrogens esterified decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Estrogens, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- estropipate
estropipate decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Enhanced tissue resistance to hyaluronidase.
- etanercept
trastuzumab, etanercept. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- ethinylestradiol
ethinylestradiol decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Estrogens, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- etoposide
trastuzumab, etoposide. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- everolimus
trastuzumab, everolimus. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- fludarabine
trastuzumab, fludarabine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- fludrocortisone
trastuzumab, fludrocortisone. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- fluorouracil
trastuzumab, fluorouracil. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- fluticasone inhaled
trastuzumab, fluticasone inhaled. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- furosemide
hyaluronidase, furosemide. Other (see comment). Use Caution/Monitor. Comment: Drug combination has been found to be incompatible.
- gemcitabine
trastuzumab, gemcitabine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- gemtuzumab
trastuzumab, gemtuzumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- glatiramer
trastuzumab, glatiramer. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- golimumab
trastuzumab, golimumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- guselkumab
trastuzumab, guselkumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- hydrocortisone
trastuzumab, hydrocortisone. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- hydroxyurea
trastuzumab, hydroxyurea. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- hydroxyzine
hydroxyzine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- ibritumomab tiuxetan
trastuzumab, ibritumomab tiuxetan. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- ibrutinib
trastuzumab, ibrutinib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- idarubicin
trastuzumab, idarubicin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- idelalisib
trastuzumab, idelalisib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- ifosfamide
trastuzumab, ifosfamide. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- imatinib
trastuzumab, imatinib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- imiquimod
trastuzumab, imiquimod. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- infliximab
trastuzumab, infliximab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- inotuzumab
trastuzumab, inotuzumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- irinotecan
trastuzumab, irinotecan. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- irinotecan liposomal
trastuzumab, irinotecan liposomal. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- ixekizumab
trastuzumab, ixekizumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- leflunomide
trastuzumab, leflunomide. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- lenalidomide
trastuzumab, lenalidomide. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- levocetirizine
levocetirizine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect. .
- lidocaine
hyaluronidase, lidocaine. Other (see comment). Use Caution/Monitor. Comment: Hyaluronidase hastens the onset of local analgesia and reduces swelling, but increases systemic absorption of anesthetic. This decreases the duration of action and increases incidence of systemic reaction.
- lomustine
trastuzumab, lomustine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- lorazepam
hyaluronidase, lorazepam. Other (see comment). Use Caution/Monitor. Comment: Drug combination has been found to be incompatible.
- mechlorethamine
trastuzumab, mechlorethamine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- melphalan
trastuzumab, melphalan. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- mercaptopurine
trastuzumab, mercaptopurine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- methotrexate
trastuzumab, methotrexate. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- methylprednisolone
trastuzumab, methylprednisolone. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- mitomycin
trastuzumab, mitomycin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- mitoxantrone
trastuzumab, mitoxantrone. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- mogamulizumab
trastuzumab, mogamulizumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- mometasone inhaled
mometasone inhaled decreases effects of hyaluronidase by Other (see comment). Modify Therapy/Monitor Closely. Comment: Corticosteroids may decrease therapeutic effects of hyaluronidase.
- mometasone topical
mometasone topical decreases effects of hyaluronidase by unspecified interaction mechanism. Modify Therapy/Monitor Closely. Patients receiving larger doses of corticosteriods may not experience the desired clinical response to standard doses of hyaluronidase. Larger doses of hyaluronidase may be required.
- mycophenolate
trastuzumab, mycophenolate. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- natalizumab
trastuzumab, natalizumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- nelarabine
trastuzumab, nelarabine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- nilotinib
trastuzumab, nilotinib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- obinutuzumab
trastuzumab, obinutuzumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- ocrelizumab
trastuzumab, ocrelizumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- ofatumumab
trastuzumab, ofatumumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- omacetaxine
trastuzumab, omacetaxine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- osimertinib
trastuzumab, osimertinib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- oxaliplatin
trastuzumab, oxaliplatin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- oxazepam
hyaluronidase, oxazepam. Other (see comment). Use Caution/Monitor. Comment: Drug combination has been found to be incompatible.
- paclitaxel
trastuzumab, paclitaxel. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- paclitaxel protein bound
trastuzumab, paclitaxel protein bound. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- palbociclib
trastuzumab, palbociclib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- panobinostat
trastuzumab, panobinostat. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- pazopanib
trastuzumab, pazopanib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .
- pemetrexed
trastuzumab, pemetrexed. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- pentostatin
trastuzumab, pentostatin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- phenytoin
hyaluronidase, phenytoin. Other (see comment). Use Caution/Monitor. Comment: Drug combination has been found to be incompatible.
- pomalidomide
trastuzumab, pomalidomide. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- ponesimod
ponesimod and trastuzumab both increase immunosuppressive effects; risk of infection. Use Caution/Monitor. Caution if coadministered because of additive immunosuppressive effects during such therapy and in the weeks following administration. When switching from drugs with prolonged immune effects, consider the half-life and mode of action of these drugs to avoid unintended additive immunosuppressive effects.
- pralatrexate
trastuzumab, pralatrexate. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- prednisolone
trastuzumab, prednisolone. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- prednisone
trastuzumab, prednisone. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- procarbazine
trastuzumab, procarbazine. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- promethazine
promethazine decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Antihistamines, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- ravulizumab
trastuzumab, ravulizumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- ribociclib
trastuzumab, ribociclib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- rilonacept
trastuzumab, rilonacept. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- rituximab
trastuzumab, rituximab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- rituximab-hyaluronidase
trastuzumab, rituximab-hyaluronidase. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- romidepsin
trastuzumab, romidepsin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- ruxolitinib
trastuzumab, ruxolitinib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- salicylates (non-asa)
salicylates (non-asa) decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Salicylates, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect. .
- salsalate
salsalate decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Salicylates, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect. .
- sarilumab
trastuzumab, sarilumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- secukinumab
trastuzumab, secukinumab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- siltuximab
trastuzumab, siltuximab. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- siponimod
siponimod and trastuzumab both increase immunosuppressive effects; risk of infection. Use Caution/Monitor. Caution if coadministered because of additive immunosuppressive effects during such therapy and in the weeks following administration. When switching from drugs with prolonged immune effects, consider the half-life and mode of action of these drugs to avoid unintended additive immunosuppressive effects.
- sirolimus
trastuzumab, sirolimus. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- sorafenib
trastuzumab, sorafenib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- streptozocin
trastuzumab, streptozocin. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- sunitinib
trastuzumab, sunitinib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- tacrolimus
trastuzumab, tacrolimus. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- temozolomide
trastuzumab, temozolomide. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- temsirolimus
trastuzumab, temsirolimus. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- teniposide
trastuzumab, teniposide. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- teriflunomide
trastuzumab, teriflunomide. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
- tetracaine
hyaluronidase, tetracaine. Other (see comment). Use Caution/Monitor. Comment: Hyaluronidase hastens the onset of local analgesia and reduces swelling, but increases systemic absorption of anesthetic. This decreases the duration of action and increases incidence of systemic reaction.
- thalidomide
trastuzumab, thalidomide. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy.
Minor (4)
- bupivacaine
hyaluronidase, bupivacaine. Other (see comment). Minor/Significance Unknown. Comment: Hyaluronidase hastens the onset of local analgesia and reduces swelling, but increases systemic absorption of anesthetic. This decreases the duration of action and increases incidence of systemic reaction.
- mepivacaine
hyaluronidase, mepivacaine. Other (see comment). Minor/Significance Unknown. Comment: Hyaluronidase hastens the onset of local analgesia and reduces swelling, but increases systemic absorption of anesthetic. This decreases the duration of action and increases incidence of systemic reaction.
- prilocaine
hyaluronidase, prilocaine. Other (see comment). Minor/Significance Unknown. Comment: Hyaluronidase hastens the onset of local analgesia and reduces swelling, but increases systemic absorption of anesthetic. This decreases the duration of action and increases incidence of systemic reaction.
- ropivacaine
hyaluronidase, ropivacaine. Other (see comment). Minor/Significance Unknown. Comment: Hyaluronidase hastens the onset of local analgesia and reduces swelling, but increases systemic absorption of anesthetic. This decreases the duration of action and increases incidence of systemic reaction.
Adverse Effects
>10% (All Grades)
Alopecia (63%)
Nausea (49%)
Fatigue (46%)
Neutropenia (44%)
Diarrhea (34%)
Rash (26%)
Upper respiratory tract infection (24%)
Vomiting (23%)
Stomatitis (21%)
Myalgia (21%)
Peripheral neuropathy (20%)
Decreased appetite (20%)
Arthralgia (18%)
Headache (17%)
Nail disorder (14%)
Abdominal pain (14%)
Flushing (14%)
Edema (14%)
Pyrexia (13%)
Anemia (12%)
Cough (12%)
Dyspepsia (11%)
Leukopenia (11%)
Back pain (11%)
Incision site complication (11%)
>10% (Grade ≥3)
Neutropenia (30%)
1-10% (All Grades)
Mucosal inflammation (10%)
Injection site reactions (10%)
Pain in extremity (10%)
Dizziness (10%)
Dysgeusia (10%)
Pruritus (9%)
Skin discoloration (9%)
Pain (8%)
Hypertension (8%)
Erythema (7%)
Dyspnea (7%)
Hypersensitivity (7%)
Febrile neutropenia (6%)
Bone pain (6%)
Epistaxis (6%)
Abnormal liver function tests (6%)
Pain (5%)
Nasal inflammation/discomfort (5%)
Arrhythmia (5%)
Urinary tract infection (4%)
1-10% (Grade ≥3)
Febrile neutropenia (6%)
Leukopenia (5%)
Diarrhea (2.7%)
Hypertension (2.4%)
Alopecia (1.3%)
Nausea (1.3%)
Vomiting (1%)
Upper respiratory tract infection (1%)
Back pain (1%)
Hypersensitivity (1%)
Abnormal liver function tests (1%)
<1% (Grade ≥3)
Erythema
Rash
Stomatitis
Fatigue
Mucosal inflammation
Anemia
Bone pain
Pain
Headache
Dizziness
Cough
Flushing
Decreased appetite
Postmarketing Reports
Administration-related reaction
Oligohydramnios or oligohydramnios sequence, including pulmonary hypoplasia, skeletal abnormalities, and neonatal death
Glomerulopathy
Immune thrombocytopenia
Tumor lysis syndrome
Warnings
Black Box Warnings
Cardiomyopathy
- Administration can result in subclinical and clinical cardiac failure
- Highest incidence and severity occurred in patients receiving trastuzumab/hyaluronidase with anthracycline-containing chemotherapy regimens
- Evaluate left ventricular function prior to and during treatment
- Discontinue treatment in patients receiving adjuvant therapy and withhold dose in patients with metastatic disease for clinically significant decrease in left ventricular function
Pulmonary toxicity
- Serious and fatal pulmonary toxicity reported
- Symptoms usually occur during or within 24 hr of administration
- Discontinue treatment for anaphylaxis, angioedema, interstitial pneumonitis, or acute respiratory distress syndrome)
- Monitor until symptoms completely resolve
Embryo-fetal toxicity
- Exposure to trastuzumab/hyaluronidase during pregnancy can result in oligohydramnios and oligohydramnios sequence manifesting as pulmonary hypoplasia, skeletal abnormalities, and neonatal death
- Inform patients of these risks and to use effective contraception
Contraindications
None
Cautions
Left ventricular cardiac dysfunction, arrhythmias, hypertension, disabling cardiac failure, cardiomyopathy, and cardiac death may occur as well as asymptomatic decline in LVEF (see Black Box Warnings)
Fetal harm may occur when administered to a pregnant woman (see Black Box Warnings and Pregnancy)
Pulmonary toxicity (eg, dyspnea, interstitial pneumonitis, pulmonary infiltrates, pleural effusions, noncardiogenic pulmonary edema, pulmonary insufficiency and hypoxia, acute respiratory distress syndrome, pulmonary fibrosis) reported; patients with symptomatic intrinsic lung disease or with extensive tumor involvement of the lungs, resulting in dyspnea at rest, appear to have more severe toxicity (see Black Box Warnings)
Chemotherapy-induced neutropenia may be exacerbated
Severe administration-related reactions (ARRs), including hypersensitivity and anaphylaxis, reported; patients experiencing dyspnea at rest due to complications of advanced malignancy and comorbidities may be at increased risk of a severe or fatal ARR
Drug interaction overview
- Since trastuzumab/hyaluronidase has a long washout period, patients who receive anthracycline after stopping trastuzumab/hyaluronidase may be at increased risk of cardiac dysfunction
- If possible, avoid anthracycline-based therapy for at least 7 months after discontinuing trastuzumab/hyaluronidase
Pregnancy & Lactation
Pregnancy
Fetal harm when administered to a pregnant woman
Verify pregnancy status of females of reproductive potential before initiation
Female: Use effective contraception during treatment and for 7 months following the last dose
Pregnancy pharmacovigilance program
- If administered during pregnancy, or if a patient becomes pregnant while during treatment or within 7 months following the last dose, immediately report exposure to Genentech at 1-888-835-2555
- In postmarketing reports, use of trastuzumab during pregnancy resulted in cases of oligohydramnios and of oligohydramnios sequence, manifesting as pulmonary hypoplasia, skeletal abnormalities, and neonatal death
- Advise patient of the potential risks to a fetus
Clinical considerations
- Monitor women who received treatment during pregnancy or within 7 months prior to conception for oligohydramnios
- If oligohydramnios occurs, perform fetal testing that is appropriate for gestational age and consistent with community standards of care
Lactation
There is no information regarding the presence of trastuzumab or hyaluronidase in human milk, the effects on the breastfed infant, or the effects on milk production
Published data suggest human IgG is present in human milk but does not enter the neonatal and infant circulation in substantial amounts
Present in the milk of lactating cynomolgus monkeys but not associated with neonatal toxicity
Consider developmental and health benefits of breastfeeding along with the mother’s clinical need for treatment and any potential adverse effects on the breastfed child or from the underlying maternal condition; also take into account the trastuzumab wash-out period of 7 months
Pregnancy Categories
A: Generally acceptable. Controlled studies in pregnant women show no evidence of fetal risk.
B: May be acceptable. Either animal studies show no risk but human studies not available or animal studies showed minor risks and human studies done and showed no risk. C: Use with caution if benefits outweigh risks. Animal studies show risk and human studies not available or neither animal nor human studies done. D: Use in LIFE-THREATENING emergencies when no safer drug available. Positive evidence of human fetal risk. X: Do not use in pregnancy. Risks involved outweigh potential benefits. Safer alternatives exist. NA: Information not available.Pharmacology
Mechanism of Action
Trastuzumab
- Monoclonal antibody; inhibits growth of tumor cells that overexpress HER2
Hyaluronidase
- Human hyaluronidase increases permeability of SC tissue by temporarily depolymerizing hyaluronan
- Effects are reversible and permeability of SC tissue is restored within 24-48 hr
Absorption
Peak plasma concentration: 79.3 mcg/mL (Cycle 1); 149 mcg/mL (Cycle 7)
Minimum plasma concentration: 28.2 mcg/mL (Cycle 1); 75 mcg/mL (Cycle 7)
AUC: 1065 mcg/mL·day (Cycle 1); 2337 mcg/mL·day (Cycle 7)
Absolute bioavailability: 0.77
Peak plasma time: 3 days
Steady-state reached after Cycle 7
Distribution
Vd: 2.9 L
Elimination
Linear elimination clearance: 0.11 L/day
Administration
SC Administration
SC administration only
To prevent medication errors, check vial labels to ensure that the prepared drug to be administered is trastuzumab/hyaluronidase and not ado-trastuzumab emtansine or IV trastuzumab
Compatible with polypropylene and polycarbonate syringe material and stainless steel transfer and injection needles
Alternate injection site between the left and right thigh
Administer new injections ≥2.5 cm from previous site on healthy skin; never inject into areas where the skin is red, bruised, tender, or hard, or areas where there are moles or scars
During treatment course, inject other SC medicinal products at different sites
Administer over ~2-5 min
Missed dose
- If 1 dose is missed, administer missed dose as soon as possible; interval between subsequent doses should not be <3 weeks
Storage
Protect from light; do not shake or freeze
If syringe is not immediately used, refrigerate (2-8°C [36-46°F]) for up to 24 hr and subsequently at room temperature (20-25°C [68-77°F]) for up to 4 hr
Vials
- Refrigerate at 2-8°C (36-46°F) in original carton
- Once removed from refrigerator, administer within 4 hr and keep <30°C (86°F)
Images
Formulary
Adding plans allows you to compare formulary status to other drugs in the same class.
To view formulary information first create a list of plans. Your list will be saved and can be edited at any time.
Adding plans allows you to:
- View the formulary and any restrictions for each plan.
- Manage and view all your plans together – even plans in different states.
- Compare formulary status to other drugs in the same class.
- Access your plan list on any device – mobile or desktop.
