Dosing & Uses
Dosage Forms & Strengths
tablet: Schedule IV
- 100mg
- 200mg
Obstructive Sleep Apnea
Indicated to improve wakefulness in adults with excessive sleepiness associated with obstructive sleep apnea (OSA)
200 mg PO qAM
Doses up to 400 mg/day, given as a single dose, have been well tolerated, but there is no consistent evidence that this dose confers additional benefit beyond that of the 200 mg/day dose
Narcolepsy
Indicated to improve wakefulness in adults with excessive sleepiness associated with narcolepsy
200 mg PO qAM
Doses up to 400 mg/day, given as a single dose, have been well tolerated, but there is no consistent evidence that this dose confers additional benefit beyond that of the 200 mg/day dose
Shift Work Sleep Disorder
Indicated to improve wakefulness in adults with excessive sleepiness associated with shift work disorder (SWD)
200 mg PO as a single dose ~1 hr prior to patient's work shift
Dosage Modifications
Hepatic impairment, severe: 100 mg PO qAM
Narcolepsy (Orphan)
Orphan designation of a fixed dose combination of modafinil and flecainide for narcolepsy
Sponsor
- Theranexus SA; 86 Rue de Paris; Orsay, France
Safety and efficacy not established
Interactions
Interaction Checker
No Results
Contraindicated
Serious - Use Alternative
Significant - Monitor Closely
Minor
Contraindicated (7)
- isocarboxazid
isocarboxazid increases effects of modafinil by pharmacodynamic synergism. Contraindicated. Risk of acute hypertensive episode.
- linezolid
linezolid increases effects of modafinil by pharmacodynamic synergism. Contraindicated. Risk of acute hypertensive episode.
- mavacamten
modafinil will increase the level or effect of mavacamten by affecting hepatic enzyme CYP2C19 metabolism. Contraindicated. Strong or moderate CYP2C19 inhibitors may increase mavacamten systemic exposure, resulting in heart failure due to systolic dysfunction.
modafinil will decrease the level or effect of mavacamten by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. - pacritinib
modafinil will decrease the level or effect of pacritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- phenelzine
phenelzine increases effects of modafinil by pharmacodynamic synergism. Contraindicated. Risk of acute hypertensive episode.
- selegiline transdermal
selegiline transdermal increases effects of modafinil by pharmacodynamic synergism. Contraindicated. Risk of acute hypertensive episode.
- tranylcypromine
tranylcypromine increases effects of modafinil by pharmacodynamic synergism. Contraindicated. Risk of acute hypertensive episode.
Serious - Use Alternative (28)
- abametapir
abametapir will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. For 2 weeks after abametapir application, avoid taking drugs that are CYP3A4 substrates. If not feasible, avoid use of abametapir.
- alosetron
modafinil will decrease the level or effect of alosetron by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug.
- amobarbital
amobarbital will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- apalutamide
apalutamide will decrease the level or effect of modafinil by affecting hepatic enzyme CYP2C19 metabolism. Avoid or Use Alternate Drug. Coadministration of apalutamide, a strong CYP2C19 inducer, with drugs that are CYP2C19 substrates can result in lower exposure to these medications. Avoid or substitute another drug for these medications when possible. Evaluate for loss of therapeutic effect if medication must be coadministered.
apalutamide will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of apalutamide, a strong CYP3A4 inducer, with drugs that are CYP3A4 substrates can result in lower exposure to these medications. Avoid or substitute another drug for these medications when possible. Evaluate for loss of therapeutic effect if medication must be coadministered. Adjust dose according to prescribing information if needed. - atazanavir
atazanavir will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- cilostazol
modafinil increases toxicity of cilostazol by affecting hepatic enzyme CYP2C19 metabolism. Avoid or Use Alternate Drug. Decrease cilostazol dose by 50%; serum levels of 3,4-dehydrocilostazol (active metabolite) increased by strong CYP2C19 inhibitors.
- clarithromycin
clarithromycin will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- clopidogrel
modafinil decreases effects of clopidogrel by affecting hepatic enzyme CYP2C19 metabolism. Avoid or Use Alternate Drug. Clopidogrel efficacy may be reduced by drugs that inhibit CYP2C19. Inhibition of platelet aggregation by clopidogrel is entirely due to an active metabolite. Clopidogrel is metabolized to this active metabolite in part by CYP2C19. .
- cobicistat
cobicistat will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- conivaptan
conivaptan will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- darunavir
darunavir will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- duloxetine
modafinil will decrease the level or effect of duloxetine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug.
- fedratinib
modafinil will increase the level or effect of fedratinib by Other (see comment). Avoid or Use Alternate Drug. Avoid coadministration of fedratinib (a CYP3A4 and CYP2C19 substrate) with dual CYP3A4 and CYP2C19 inhibitor. Effect of coadministration of a dual CYP3A4 and CYP2C19 inhibitor with fedratinib has not been studied.
- fexinidazole
fexinidazole will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Fexinidazole inhibits CYP3A4. Coadministration may increase risk for adverse effects of CYP3A4 substrates.
- ganaxolone
modafinil will decrease the level or effect of ganaxolone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of ganaxolone with moderate or strong CYP3A4 inducers. If coadministration unavoidable, consider increasing ganaxolone dose; however, do not exceed maximum daily dose for weight.
- idelalisib
idelalisib will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Idelalisib is a strong CYP3A inhibitor; avoid coadministration with sensitive CYP3A substrates
- iobenguane I 131
modafinil will decrease the level or effect of iobenguane I 131 by Other (see comment). Avoid or Use Alternate Drug. Based on the mechanism of action of iobenguane, drugs that reduce catecholamine uptake or that deplete catecholamine stores may interfere with iobenguane uptake into cells, and thus, reduce iobenguane efficacy. Discontinue interfering drugs for at least 5 half-lives before administration of either the dosimetry or an iobenguane dose. Do not administer these drugs until at least 7 days after each iobenguane dose.
- ivosidenib
ivosidenib will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of sensitive CYP3A4 substrates with ivosidenib or replace with alternative therapies. If coadministration is unavoidable, monitor patients for loss of therapeutic effect of these drugs.
- lorlatinib
lorlatinib, modafinil. Either decreases effects of the other by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of both drugs increases risk of severe hepatotoxicity.
- lumateperone
modafinil will decrease the level or effect of lumateperone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- ozanimod
ozanimod increases toxicity of modafinil by sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Avoid or Use Alternate Drug. Because the active metabolite of ozanimod inhibits MAO-B in vitro, there is a potential for serious adverse reactions, including hypertensive crisis. Therefore, coadministration of ozanimod with drugs that can increase norepinephrine or serotonin is not recommended. Monitor for hypertension with concomitant use.
- phenobarbital
phenobarbital will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- ritonavir
ritonavir will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- secobarbital
secobarbital will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- tizanidine
modafinil will decrease the level or effect of tizanidine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug.
- tucatinib
tucatinib will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid concomitant use of tucatinib with CYP3A substrates, where minimal concentration changes may lead to serious or life-threatening toxicities. If unavoidable, reduce CYP3A substrate dose according to product labeling.
- vonoprazan
modafinil will decrease the level or effect of vonoprazan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- voxelotor
voxelotor will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Voxelotor increases systemic exposure of sensitive CYP3A4 substrates. Avoid coadministration with sensitive CYP3A4 substrates with a narrow therapeutic index. Consider dose reduction of the sensitive CYP3A4 substrate(s) if unable to avoid.
Monitor Closely (213)
- abrocitinib
modafinil will increase the level or effect of abrocitinib by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Start abrocitinib 50 mg qDay when coadministered with CYP2C19 inhibitors. If adequate response not achieved after 12 weeks, may increase to 100 mg qDay. Discontinue if inadequate response after dosage increase.
- albuterol
albuterol and modafinil both decrease sedation. Use Caution/Monitor.
- alfentanil
alfentanil increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- alprazolam
alprazolam increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- amitriptyline
modafinil will increase the level or effect of amitriptyline by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.
amitriptyline increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - amobarbital
amobarbital increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- amoxapine
amoxapine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- arformoterol
arformoterol and modafinil both decrease sedation. Use Caution/Monitor.
- aripiprazole
aripiprazole increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- armodafinil
armodafinil and modafinil both decrease sedation. Use Caution/Monitor.
- azelastine
azelastine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- belladonna and opium
belladonna and opium increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- belzutifan
modafinil will increase the level or effect of belzutifan by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Belzutifan is a CYP2C19 substrate. Coadministration with CYP2C19 inhibitors may increase incidence or severity of adverse effects. Monitor for anemia and hypoxia and reduce belzutifan dose as recommended.
- benperidol
benperidol increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- benzphetamine
modafinil and benzphetamine both decrease sedation. Use Caution/Monitor.
- bortezomib
modafinil will increase the level or effect of bortezomib by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.
- brompheniramine
brompheniramine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- buprenorphine buccal
buprenorphine buccal increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- butabarbital
butabarbital increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- butalbital
butalbital increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- butorphanol
butorphanol increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- caffeine
caffeine and modafinil both decrease sedation. Use Caution/Monitor.
- cannabidiol
modafinil will increase the level or effect of cannabidiol by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Consider reducing the cannabidiol dose when coadministered with a strong CYP2C19 inhibitor.
cannabidiol will increase the level or effect of modafinil by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Consider reducing the dose of sensitive CYP2C19 substrates, as clinically appropriate, when coadministered with cannabidiol. - carbamazepine
carbamazepine will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- carbinoxamine
carbinoxamine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- cenobamate
cenobamate will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Increase dose of CYP3A4 substrate, as needed, when coadministered with cenobamate.
cenobamate will increase the level or effect of modafinil by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Consider a dose reduction of CYP2C19 substrates, as clinically appropriate, when used concomitantly with cenobamate. - chloral hydrate
chloral hydrate increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- chlordiazepoxide
chlordiazepoxide increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- chlorpheniramine
chlorpheniramine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- chlorpromazine
chlorpromazine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- cinnarizine
cinnarizine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- citalopram
modafinil will increase the level or effect of citalopram by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. Citalopram 20 mg/day is the maximum recommended dose for patients taking CYP2C19 inhibitors because of the risk of QT prolongation.
- clemastine
clemastine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- clobazam
modafinil will increase the level or effect of clobazam by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. Dosage adjustment may be required; CYP2C19 inhibitors may result in increased exposure to N-desmethylclobazam (active metabolite).
- clomipramine
modafinil will decrease the level or effect of clomipramine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.
clomipramine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - clonazepam
clonazepam increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- clorazepate
clorazepate increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- clozapine
modafinil will decrease the level or effect of clozapine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.
clozapine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - codeine
codeine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- crizotinib
crizotinib increases levels of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Dose reduction may be needed for coadministered drugs that are predominantly metabolized by CYP3A.
- crofelemer
crofelemer increases levels of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Crofelemer has the potential to inhibit CYP3A4 at concentrations expected in the gut; unlikely to inhibit systemically because minimally absorbed.
- cyclizine
cyclizine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- cyproheptadine
cyproheptadine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- dabrafenib
dabrafenib will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely.
- desipramine
desipramine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- dexchlorpheniramine
dexchlorpheniramine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- dexfenfluramine
modafinil and dexfenfluramine both decrease sedation. Use Caution/Monitor.
- dexmedetomidine
dexmedetomidine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- dexmethylphenidate
dexmethylphenidate and modafinil both decrease sedation. Use Caution/Monitor.
- dextroamphetamine
dextroamphetamine and modafinil both decrease sedation. Use Caution/Monitor.
- dextromoramide
dextromoramide increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- diamorphine
diamorphine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- diazepam intranasal
modafinil will increase the level or effect of diazepam intranasal by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. Strong or moderate CYP2C19 inhibitors may decrease rate of diazepam elimination, thereby increasing adverse reactions to diazepam.
- diethylpropion
modafinil and diethylpropion both decrease sedation. Use Caution/Monitor.
- difenoxin hcl
difenoxin hcl increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- dimenhydrinate
dimenhydrinate increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- diphenhydramine
diphenhydramine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- diphenoxylate hcl
diphenoxylate hcl increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- dipipanone
dipipanone increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- dobutamine
dobutamine and modafinil both decrease sedation. Use Caution/Monitor.
- dopamine
modafinil and dopamine both decrease sedation. Use Caution/Monitor.
- dopexamine
dopexamine and modafinil both decrease sedation. Use Caution/Monitor.
- doxepin
doxepin increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- droperidol
droperidol increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- efavirenz
efavirenz will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- elagolix
elagolix will increase the level or effect of modafinil by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Elagolix is a weak CYP2C19 inhibitor. Caution with sensitive CYP2C19 substrates.
elagolix decreases levels of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Elagolix is a weak-to-moderate CYP3A4 inducer. Monitor CYP3A substrates if coadministered. Consider increasing CYP3A substrate dose if needed. - eluxadoline
modafinil increases levels of eluxadoline by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. As a precautionary measure due to incomplete information on the metabolism of eluxadoline, use caution when coadministered with strong CYP2C19 inhibitors.
- elvitegravir/cobicistat/emtricitabine/tenofovir DF
elvitegravir/cobicistat/emtricitabine/tenofovir DF increases levels of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Cobicistat is a CYP3A4 inhibitor; contraindicated with CYP3A4 substrates for which elevated plasma concentrations are associated with serious and/or life-threatening events.
- encorafenib
encorafenib, modafinil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
- enzalutamide
enzalutamide will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- ephedrine
ephedrine and modafinil both decrease sedation. Use Caution/Monitor.
- epinephrine
epinephrine and modafinil both decrease sedation. Use Caution/Monitor.
- epinephrine inhaled
modafinil, epinephrine inhaled. Either increases effects of the other by sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.
- epinephrine racemic
epinephrine racemic and modafinil both decrease sedation. Use Caution/Monitor.
- escitalopram
modafinil will increase the level or effect of escitalopram by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely.
- esketamine intranasal
esketamine intranasal, modafinil. Either increases toxicity of the other by sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor. Closely monitor blood pressure with concomitant use of esketamine nasal with stimulants. .
- eslicarbazepine acetate
eslicarbazepine acetate will increase the level or effect of modafinil by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.
- estazolam
estazolam increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- ethanol
ethanol increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- etravirine
modafinil will increase the level or effect of etravirine by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.
etravirine will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. - fedratinib
fedratinib will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Adjust dose of drugs that are CYP3A4 substrates as necessary.
fedratinib will increase the level or effect of modafinil by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. Adjust dose of drugs that are CYP2C19 substrates as necessary. - fenfluramine
modafinil and fenfluramine both decrease sedation. Use Caution/Monitor.
- fexinidazole
fexinidazole will increase the level or effect of modafinil by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.
- flibanserin
modafinil will increase the level or effect of flibanserin by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Coadministration of flibanserin with strong CYP2C19 inhibitors may increase flibanserin exposure and increase the risk of hypotension, syncope, and CNS depression.
- fluphenazine
fluphenazine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- flurazepam
flurazepam increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- formoterol
formoterol and modafinil both decrease sedation. Use Caution/Monitor.
- fosphenytoin
fosphenytoin will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- green tea
green tea, modafinil. Other (see comment). Use Caution/Monitor. Comment: Green tea may include caffeine. Caffeine is a CNS-stimulant and additive effects may be seen when coadministered with other CNS stimulants. Caffeine should be avoided or used cautiously.
- haloperidol
haloperidol increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- hydromorphone
hydromorphone increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- hydroxyzine
hydroxyzine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- iloperidone
iloperidone increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
iloperidone increases levels of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Iloperidone is a time-dependent CYP3A inhibitor and may lead to increased plasma levels of drugs predominantly eliminated by CYP3A4. - imipramine
modafinil will decrease the level or effect of imipramine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.
modafinil will increase the level or effect of imipramine by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.
imipramine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - indinavir
indinavir will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- isoproterenol
isoproterenol and modafinil both decrease sedation. Use Caution/Monitor.
- istradefylline
istradefylline will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Istradefylline 40 mg/day increased peak levels and AUC of CYP3A4 substrates in clinical trials. This effect was not observed with istradefylline 20 mg/day. Consider dose reduction of sensitive CYP3A4 substrates.
- itraconazole
itraconazole will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- ketoconazole
ketoconazole will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- ketotifen, ophthalmic
ketotifen, ophthalmic increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- letermovir
letermovir increases levels of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- levalbuterol
levalbuterol and modafinil both decrease sedation. Use Caution/Monitor.
- levoketoconazole
levoketoconazole will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- levorphanol
levorphanol increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- lidocaine
modafinil will decrease the level or effect of lidocaine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.
- lisdexamfetamine
lisdexamfetamine and modafinil both decrease sedation. Use Caution/Monitor.
- lofepramine
lofepramine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- lofexidine
lofexidine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- loprazolam
loprazolam increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- lorazepam
lorazepam increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- lormetazepam
lormetazepam increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- loxapine
loxapine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- loxapine inhaled
loxapine inhaled increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- lumacaftor/ivacaftor
lumacaftor/ivacaftor, modafinil. affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. In vitro studies suggest that lumacaftor may induce and ivacaftor may inhibit CYP2C19 substrates. .
- maprotiline
maprotiline increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- marijuana
marijuana increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- melatonin
melatonin increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- meperidine
meperidine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- meprobamate
meprobamate increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- metaproterenol
metaproterenol and modafinil both decrease sedation. Use Caution/Monitor.
- methadone
methadone increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- methamphetamine
methamphetamine and modafinil both decrease sedation. Use Caution/Monitor.
- methylenedioxymethamphetamine
methylenedioxymethamphetamine and modafinil both decrease sedation. Use Caution/Monitor.
- methylphenidate
modafinil increases effects of methylphenidate by pharmacodynamic synergism. Use Caution/Monitor. Risk of acute hypertensive episode.
- mexiletine
modafinil will decrease the level or effect of mexiletine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.
- midazolam
midazolam increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- midodrine
modafinil and midodrine both decrease sedation. Use Caution/Monitor.
- mifepristone
mifepristone will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- mirtazapine
mirtazapine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- mitotane
mitotane decreases levels of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Mitotane is a strong inducer of cytochrome P-4503A4; monitor when coadministered with CYP3A4 substrates for possible dosage adjustments.
- morphine
morphine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- motherwort
motherwort increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- moxonidine
moxonidine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- nabilone
nabilone increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- nalbuphine
nalbuphine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- nefazodone
nefazodone will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- nelfinavir
nelfinavir will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- nevirapine
nevirapine will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- norepinephrine
norepinephrine and modafinil both decrease sedation. Use Caution/Monitor.
- nortriptyline
nortriptyline increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- olanzapine
modafinil will decrease the level or effect of olanzapine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.
olanzapine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - omeprazole
modafinil will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.
- opium tincture
opium tincture increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- ospemifene
modafinil increases levels of ospemifene by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.
- oxazepam
oxazepam increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- oxycodone
oxycodone increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- oxymorphone
oxymorphone increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- paliperidone
paliperidone increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- papaveretum
papaveretum increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- pentazocine
pentazocine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- pentobarbital
pentobarbital increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- perphenazine
perphenazine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- phendimetrazine
modafinil and phendimetrazine both decrease sedation. Use Caution/Monitor.
- phenobarbital
phenobarbital increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- phentermine
modafinil and phentermine both decrease sedation. Use Caution/Monitor.
- phenylephrine
modafinil and phenylephrine both decrease sedation. Use Caution/Monitor.
- phenylephrine PO
modafinil and phenylephrine PO both decrease sedation. Use Caution/Monitor.
- phenytoin
phenytoin will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- pholcodine
pholcodine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- pimozide
pimozide increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- pirbuterol
pirbuterol and modafinil both decrease sedation. Use Caution/Monitor.
- posaconazole
posaconazole will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- primidone
primidone will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- procarbazine
procarbazine increases effects of modafinil by pharmacodynamic synergism. Use Caution/Monitor. Risk of acute hypertensive episode.
- prochlorperazine
prochlorperazine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- promethazine
promethazine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- propylhexedrine
modafinil and propylhexedrine both decrease sedation. Use Caution/Monitor.
- protriptyline
protriptyline increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- quazepam
quazepam increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- quetiapine
quetiapine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- ramelteon
modafinil will decrease the level or effect of ramelteon by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.
- rasagiline
rasagiline increases effects of modafinil by pharmacodynamic synergism. Use Caution/Monitor. Risk of acute hypertensive episode. Use caution when administering MAOIs and modafinil.
- ribociclib
ribociclib will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- rifabutin
rifabutin will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- rifapentine
rifapentine will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- risperidone
risperidone increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- roflumilast
modafinil will decrease the level or effect of roflumilast by affecting hepatic enzyme CYP1A2 metabolism. Modify Therapy/Monitor Closely. Concomitant therapy may reduce therapeutic effectiveness.
- salmeterol
salmeterol and modafinil both decrease sedation. Use Caution/Monitor.
- saquinavir
saquinavir will increase the level or effect of modafinil by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Use alternatives if available.
saquinavir will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. - scullcap
scullcap increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- secobarbital
secobarbital increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- selegiline
selegiline increases effects of modafinil by pharmacodynamic synergism. Use Caution/Monitor. Risk of acute hypertensive episode. Use caution when administering MAOIs and modafinil.
- serdexmethylphenidate/dexmethylphenidate
serdexmethylphenidate/dexmethylphenidate and modafinil both decrease sedation. Use Caution/Monitor.
- shepherd's purse
shepherd's purse increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- sofosbuvir/velpatasvir
sofosbuvir/velpatasvir increases levels of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Velpatasvir inhibits CYP3A4. Caution if coadministered with drugs with narrow therapeutics indexes.
- solriamfetol
modafinil and solriamfetol both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Use Caution/Monitor.
- sorafenib
modafinil decreases levels of sorafenib by increasing metabolism. Use Caution/Monitor.
- stiripentol
stiripentol, modafinil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Stiripentol is a CYP3A4 inhibitor and inducer. Monitor CYP3A4 substrates coadministered with stiripentol for increased or decreased effects. CYP3A4 substrates may require dosage adjustment.
stiripentol will increase the level or effect of modafinil by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Consider reducing the dose of CYP2C19 substrates, if adverse reactions are experienced when administered concomitantly with stiripentol. - sufentanil
sufentanil increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- tapentadol
tapentadol increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- tazemetostat
tazemetostat will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- tecovirimat
tecovirimat will increase the level or effect of modafinil by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. Tecovirimat is a weak inhibitor of CYP2C8 and CYP2C19. Monitor for adverse effects if coadministered with sensitive substrates of these enzymes.
tecovirimat will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Tecovirimat is a weak CYP3A4 inducer. Monitor sensitive CYP3A4 substrates for effectiveness if coadministered. - temazepam
temazepam increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- terbutaline
terbutaline and modafinil both decrease sedation. Use Caution/Monitor.
- theophylline
modafinil will decrease the level or effect of theophylline by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.
- thioridazine
thioridazine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- thiothixene
thiothixene increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- tofacitinib
modafinil increases levels of tofacitinib by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. No specific dose adjustment recommended when tofacitinib coadministered with potent CYP2C19 inhibitors; decrease tofacitinib dose if coadministered with both moderate CYP3A4 and potent CYP2C19 inhibitors .
- topiramate
topiramate increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Modify Therapy/Monitor Closely.
- tramadol
tramadol increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- trazodone
trazodone increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- triazolam
triazolam increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- triclabendazole
triclabendazole will increase the level or effect of modafinil by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. If plasma concentrations of the CYP2C19 substrates are elevated during triclabendazole, recheck plasma concentration of the CYP2C19 substrates after discontinuation of triclabendazole.
- triclofos
triclofos increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- trifluoperazine
trifluoperazine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- trimipramine
trimipramine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- triprolidine
triprolidine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- voriconazole
voriconazole will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- warfarin
modafinil will increase the level or effect of warfarin by Other (see comment). Use Caution/Monitor. Warfarin's less potent R-enantiomer is metabolized in part by CYP3A4 (and also CYP1A2 and CYP2C19). Monitor INR more frequently if coadministered with inhibitors of these isoenzymes and adjust warfarin dose if needed.
- xylometazoline
modafinil and xylometazoline both decrease sedation. Use Caution/Monitor.
- yohimbine
modafinil and yohimbine both decrease sedation. Use Caution/Monitor.
- ziconotide
ziconotide increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- ziprasidone
ziprasidone increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
Minor (23)
- amantadine
amantadine, modafinil. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. Potential for additive CNS stimulation.
- ambrisentan
modafinil will increase the level or effect of ambrisentan by affecting hepatic enzyme CYP2C19 metabolism. Minor/Significance Unknown.
- American ginseng
American ginseng increases effects of modafinil by pharmacodynamic synergism. Minor/Significance Unknown.
- antipyrine
modafinil will decrease the level or effect of antipyrine by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.
- asenapine
modafinil will decrease the level or effect of asenapine by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.
- bupropion
modafinil, bupropion. increasing metabolism. Minor/Significance Unknown. Decr levels of bupropion, but incr levels of active metabolites. .
- caffeine
modafinil will decrease the level or effect of caffeine by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.
- cimetidine
modafinil will increase the level or effect of cimetidine by affecting hepatic enzyme CYP2C19 metabolism. Minor/Significance Unknown.
- cocaine
modafinil will decrease the level or effect of cocaine by affecting hepatic enzyme CYP2B6 metabolism. Minor/Significance Unknown.
- diazepam
modafinil will increase the level or effect of diazepam by affecting hepatic enzyme CYP2C19 metabolism. Minor/Significance Unknown.
- eucalyptus
eucalyptus increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Minor/Significance Unknown.
- frovatriptan
modafinil will decrease the level or effect of frovatriptan by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.
- guarana
guarana increases effects of modafinil by pharmacodynamic synergism. Minor/Significance Unknown.
- lansoprazole
modafinil will increase the level or effect of lansoprazole by affecting hepatic enzyme CYP2C19 metabolism. Minor/Significance Unknown. Net effect on pantoprazole actions unknown due to opposing effects of CYP450 enzymes; monitor
- levoketoconazole
modafinil will decrease the level or effect of levoketoconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- ondansetron
modafinil will decrease the level or effect of ondansetron by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.
- pantoprazole
modafinil will increase the level or effect of pantoprazole by affecting hepatic enzyme CYP2C19 metabolism. Minor/Significance Unknown. Net effect on pantoprazole actions unknown due to opposing effects of CYP450 enzymes; monitor
- rabeprazole
modafinil will increase the level or effect of rabeprazole by affecting hepatic enzyme CYP2C19 metabolism. Minor/Significance Unknown. Net effect on pantoprazole actions unknown due to opposing effects of CYP450 enzymes; monitor
- rifampin
rifampin will decrease the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- riluzole
modafinil will decrease the level or effect of riluzole by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.
- sage
sage increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Minor/Significance Unknown.
- voriconazole
modafinil will increase the level or effect of voriconazole by affecting hepatic enzyme CYP2C19 metabolism. Minor/Significance Unknown.
- yerba mate
yerba mate increases effects of modafinil by pharmacodynamic synergism. Minor/Significance Unknown.
Adverse Effects
>10%
Headache (45-50%)
Rhinitis (11-15%)
Decreased appetite (16%)
Nausea (11%)
Abdominal pain (12%)
1-10%
Nervousness (6-10%)
Syncope (1-5%)
Frequency Not Defined
Arrhythmia
Hypotension
Hypertension
T-wave changes
Amnesia
Anxiety
Cataplexy
Chills
Depression
Dizziness
Epistaxis
Fever
Insomnia
Paresthesia
Reversible psychosis (rare)
Tremor
Drug hypersensitivity syndrome
Stevens-Johnson syndrome
Toxic epidermal necrolysis due to drug
Anorexia
Diarrhea
Dry mouth
Mouth ulcer
Vomiting
Abnormal LFT
Chest pain
Neck pain
Dyspnea
Pharyngitis
Postmarketing Reports
Aggression
Psychomotor hyperactivity
Warnings
Contraindications
Hypersensitivity
Cautions
Risk of skin reactions (eg SJS, toxic necrolysis, and drug rash with eosinophilia and systemic symptoms); discontinue if rash or other hypersensitivity reactions occur
May impair ability to operate heavy machinery and perform hazardous tasks
Not recommended in patients with angina, cardiac ischemia, recent history of myocardial infarction, left ventricular hypertrophy, or mitral valve prolapse
Use with caution in severe hepatic impairment, elderly, history of: depression, psychosis (may exacerbate psychiatric symptoms), or mania
Use with caution in patients with Tourette syndrome; stimulants may unmask ticks
May reduce effectiveness of steroidal contraceptives 1 month after discontinuation of drug therapy
Reassess degree of sleepiness frequently; if used adjunctively with continuous positive airway pressure (CPAP): Periodic assessment of CPAP compliance is necessary
Discontinue at first sign of serious rash
Discontinue therapy if symptoms suggest angioedema or anaphylaxis
Discontinue if multiorgan hypersensitivity reaction is suspected
Drug interaction overview
CYP3A4/5 substrates
- Modafinil moderately induces CYP3A4/5, which may result in lower systemic exposure of CYP3A4/5 substrates (eg, hormonal contraceptives, cyclosporine, midazolam, triazolam)
- Dose adjustment of substrate may be required
CYP2C19 substrates
- Modafinil weakly inhibits CYP2C19, which may result in higher systemic exposure of CYP2C19 substrates (eg, phenytoin, diazepam, propranolol, omeprazole, clomipramine)
- Individuals deficient in CYP2D6 enzyme, the levels of CYP2D6 substrates which have ancillary routes of elimination through CYP2C19 (eg, TCAs, SSRIs), may be increased by coadministration
- Dose adjustments of these drugs and other drugs that are substrates for CYP2C19 may be necessary if modafinil is coadministered
Warfarin
- Modafinil appeared to produce a concentration-related suppression of CYP2C9 activity, therefore suggesting potential for CYP2C9 inhibition; caution if drugs that have a narrow therapeutic index
- Consider more frequent monitoring of prothrombin times/INR
MAO inhibitors
- Other CNS stimulants may induce severe cardiovascular reactions; avoid coadministration
Pregnancy & Lactation
Pregnancy
Well controlled studies in pregnant women have not been performed
Intrauterine growth restriction and spontaneous abortion have been reported with modafinil and armodafinil
In studies conducted in rats (modafinil, armodafinil) and rabbits (modafinil), developmental toxicity was observed at clinically relevant plasma exposures
Pregnancy registry to collect information on pregnancy outcomes of women exposed to modafinil: 866-404-4106
Lactation
Unknown is excreted in human milk
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
Unknown; not sympathomimetic; may increase dopamine levels in the brain by binding to the dopamine transporter and inhibiting dopamine reuptake
Absorption
Peak plasma time: 2-4 hr
Distribution
Protein bound: 60%
Vd: 0.9 L/kg
Metabolism
Hepatic
Enzymes induced: CYP1A2, CYP2B6, CYP3A4; induces its own metabolism (chronic)
Enzymes inhibited: CYP2C19
Elimination
Half-life: 15 hr
Excretion: Urine (80%)
Images
| BRAND | FORM. | UNIT PRICE | PILL IMAGE |
|---|---|---|---|
| modafinil oral - | 100 mg tablet |  | |
| modafinil oral - | 100 mg tablet |  | |
| modafinil oral - | 200 mg tablet |  | |
| modafinil oral - | 200 mg tablet |  | |
| modafinil oral - | 100 mg tablet |  | |
| modafinil oral - | 200 mg tablet |  | |
| modafinil oral - | 100 mg tablet |  | |
| modafinil oral - | 200 mg tablet |  | |
| modafinil oral - | 100 mg tablet |  | |
| modafinil oral - | 200 mg tablet |  | |
| modafinil oral - | 200 mg tablet |  | |
| modafinil oral - | 100 mg tablet |  | |
| modafinil oral - | 200 mg tablet |  | |
| modafinil oral - | 200 mg tablet |  | |
| modafinil oral - | 100 mg tablet |  | |
| Provigil oral - | 200 mg tablet | | |
| Provigil oral - | 100 mg tablet | |
Copyright © 2010 First DataBank, Inc.
Patient Handout
modafinil oral
MODAFINIL - ORAL
(moe-DAF-i-nil)
COMMON BRAND NAME(S): Provigil
USES: Modafinil reduces extreme sleepiness due to narcolepsy and other sleep disorders, such as periods of stopped breathing during sleep (obstructive sleep apnea). It is also used to help you stay awake during work hours if you have a work schedule that keeps you from having a normal sleep routine (shift work sleep disorder).This medication does not cure these sleep disorders and may not get rid of all your sleepiness. Modafinil does not take the place of getting enough sleep. It should not be used to treat tiredness or hold off sleep in people who do not have a sleep disorder.It is not known how modafinil works to keep you awake. It is thought to work by affecting certain substances in the brain that control the sleep/wake cycle.
HOW TO USE: Read the Medication Guide provided by your pharmacist before you start using modafinil and each time you get a refill. If you have any questions, ask your doctor or pharmacist.For narcolepsy, take this medication by mouth with or without food as directed by your doctor, usually once daily in the morning. Or, if your doctor directs you to, the total daily dose of modafinil may be divided into a morning dose and a noon dose.For obstructive sleep apnea, take this medication by mouth with or without food as directed by your doctor, usually once daily in the morning. Continue your other treatment (such as the CPAP machine, mouth device) unless your doctor tells you to stop.If you are using modafinil for shift work sleep disorder, take it by mouth with or without food as directed by your doctor, usually once a day 1 hour before you start your work shift.The dosage is based on your medical condition and response to treatment. Take this medication regularly to get the most benefit from it.If you suddenly stop using this medication, you may have withdrawal symptoms (such as shaking, sweating, chills, nausea, vomiting, confusion). To help prevent withdrawal, your doctor may lower your dose slowly. Withdrawal is more likely if you have used modafinil for a long time or in high doses. Tell your doctor or pharmacist right away if you have withdrawal.When this medication is used for a long time, it may not work as well. Talk with your doctor if this medication stops working well.Though it helps many people, this medication may sometimes cause addiction. This risk may be higher if you have a substance use disorder (such as overuse of or addiction to drugs/alcohol). Take this medication exactly as prescribed to lower the risk of addiction. Ask your doctor or pharmacist for more details.Tell your doctor if your condition does not improve or if it worsens.
SIDE EFFECTS: Headache, nausea, nervousness, dizziness, or difficulty sleeping may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.Tell your doctor right away if you have any serious side effects, including: fast/pounding/irregular heartbeat, mental/mood changes (such as agitation, confusion, depression, hallucinations, rare thoughts of suicide).Get medical help right away if you have any very serious side effects, including: chest pain.A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: fever, swollen lymph nodes, rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.In the US -Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
PRECAUTIONS: Before taking modafinil, tell your doctor or pharmacist if you are allergic to it; or to armodafinil; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.Before using this medication, tell your doctor or pharmacist your medical history, especially of: heart problems (such as enlarged heart, mitral valve problem, chest pain, heart attack, irregular heartbeat), heart problems after taking stimulant drugs such as amphetamines (including chest pain, irregular heartbeat), high blood pressure, liver problems, mental/mood disorders (such as depression, mania, psychosis), personal or family history of a substance use disorder (such as overuse of or addiction to drugs/alcohol).Sleep disorders may reduce your ability to react quickly. Though modafinil helps keep you awake, you still may not be able to safely do things that require quick reactions (such as driving). This drug may also make you dizzy. Alcohol or marijuana (cannabis) can make you more dizzy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Avoid alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis).Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).Tell your doctor if you are pregnant or plan to become pregnant. You should not become pregnant while using modafinil. Modafinil may harm an unborn baby. Ask about reliable forms of non-hormonal birth control while using this medication and for 2 months after stopping treatment. If you become pregnant, talk to your doctor right away about the risks and benefits of this medication.It is unknown if this drug passes into breast milk. Consult your doctor before breast-feeding.
DRUG INTERACTIONS: Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.Some products that may interact with this drug include: street drugs (such as methamphetamine, MDMA/"ecstasy").This medication may decrease the effectiveness of hormonal birth control such as pills, patch, or ring. This could cause pregnancy. Discuss with your doctor or pharmacist if you should use additional reliable birth control methods while using this medication and for 1 month after stopping this medication. Also tell your doctor if you have any new spotting or breakthrough bleeding, because these may be signs that your birth control is not working well.Modafinil can speed up the removal of other medications from your body, which may affect how they work. Examples of affected drugs include axitinib, bosutinib, daridorexant, certain products used to treat chronic hepatitis C (asunaprevir, ombitasvir/paritaprevir/ritonavir), among others.Some products have ingredients that could raise your heart rate or blood pressure. Tell your pharmacist what products you are using, and ask how to use them safely (especially cough-and-cold products or diet aids).Caffeine can increase the side effects of this medication. Avoid drinking large amounts of beverages containing caffeine (coffee, tea, colas), eating large amounts of chocolate, or taking nonprescription products that contain caffeine.Modafinil is very similar to armodafinil. Do not take medications containing armodafinil while using modafinil.
OVERDOSE: If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose include: fast/irregular heartbeat, severe restlessness, hallucinations.
NOTES: Do not share this medication with others. Sharing it is against the law.Laboratory and/or medical tests (such as blood pressure, heart rate) may be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.Follow good sleep habits (such as sleeping in a dark/quiet room, avoiding caffeine close to bedtime) which can help improve your sleep if you have shift work sleep disorder.
MISSED DOSE: If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up. Do not take missed doses close to bedtime because doing so may make it harder to go to sleep.
STORAGE: Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Information last revised April 2022. Copyright(c) 2022 First Databank, Inc.
IMPORTANT: HOW TO USE THIS INFORMATION: This is a summary and does NOT have all possible information about this product. This information does not assure that this product is safe, effective, or appropriate for you. This information is not individual medical advice and does not substitute for the advice of your health care professional. Always ask your health care professional for complete information about this product and your specific health needs.
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.
