Dosing & Uses
Dosage Forms & Strengths
oral suspension, microsize
- 125mg/5mL
tablet, microsize
- 500mg (Grifulvin V)
tablet, ultramicrosize
- 125mg (Gris-PEG)
- 250mg (Gris-PEG)
Tinea Infection
Infections affecting skin, body, hair/beard, or nails
Microsize
- Tinea corporis, cruris, or capitis: 500 mg/day PO
- Tinea pedis or unguium: 1000 mg/day PO as single daily dose or divided q12hr
Ultramicrosize
- Tinea corporis, cruris, or capitis: 375 mg/day PO
- Tinea pedis or unguium: 250 mg PO q8hr
Treatment duration
- Dependent on infection site
- Tinea corporis: 2-4 weeks
- Tinea capitis: 4-6 weeks; may be up to 8-12 weeks
- Tinea pedis: 4-8 weeks
- Tinea unguium: 4-6 months
Dosing considerations
- Absorption increased with fatty meals
Dosage Forms & Strengths
oral suspension, microsize
- 125mg/5mL
tablet, microsize
- 500mg (Grifulvin V)
tablet, ultramicrosize
- 125mg (Gris-PEG)
- 250mg (Bris-PEG)
Tinea Infection
Infections affecting skin, body, hair/beard, or nails
<2 years old: Safety and efficacy not established
Microsize
- 11 mg/kg/day PO as single dose or divided q12hr
- 13.6-22.7 kg (30-50 lb): 125-250 mg/day
- >22.7 kg (>50 lb): 250-500 mg/day
- Off-label: 10-20 mg/kg/day PO divided q12hr
Ultramicrosize
- 7.3 mg/kg/day PO
- 13.6-22.7 kg (30-50 lb): 82.5-165 mg/day
- >22.7 kg (>50 lb): 165-330 mg/day
- Off-label: 5-15 mg/kg/day PO divided q12hr; not to exceed 750 mg/day
Treatment duration
- Dependent on infection site
- Tinea corporis: 2-4 weeks
- Tinea capitis: 4-6 weeks; may be up to 8-12 weeks
- Tinea pedis: 4-8 weeks
- Tinea unguium: 4-6 months
Dosing considerations
- Absorption increased with fatty meals
Interactions
Interaction Checker
No Results
Contraindicated
Serious - Use Alternative
Significant - Monitor Closely
Minor
Contraindicated (0)
Serious - Use Alternative (23)
- aminolevulinic acid oral
aminolevulinic acid oral, griseofulvin. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Avoid administering other phototoxic drugs with aminolevulinic acid oral for 24 hr during perioperative period.
- aminolevulinic acid topical
griseofulvin, aminolevulinic acid topical. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Each drug may increase the photosensitizing effect of the other.
- dihydroergotamine
griseofulvin will decrease the level or effect of dihydroergotamine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- dihydroergotamine intranasal
griseofulvin will decrease the level or effect of dihydroergotamine intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- dronedarone
griseofulvin will decrease the level or effect of dronedarone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- ergotamine
griseofulvin will decrease the level or effect of ergotamine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- erythromycin base
griseofulvin will decrease the level or effect of erythromycin base by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- erythromycin ethylsuccinate
griseofulvin will decrease the level or effect of erythromycin ethylsuccinate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- erythromycin lactobionate
griseofulvin will decrease the level or effect of erythromycin lactobionate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- erythromycin stearate
griseofulvin will decrease the level or effect of erythromycin stearate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- ethinylestradiol
griseofulvin will decrease the level or effect of ethinylestradiol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. The efficacy of hormonal contraceptives may be reduced. Use of a nonhormonal contraceptive is recommended.
- everolimus
griseofulvin will decrease the level or effect of everolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- lovastatin
griseofulvin will decrease the level or effect of lovastatin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- methyl aminolevulinate
griseofulvin, methyl aminolevulinate. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Each drug may increase the photosensitizing effect of the other.
- pacritinib
griseofulvin will decrease the level or effect of pacritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- ranolazine
griseofulvin will decrease the level or effect of ranolazine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- Saccharomyces boulardii
griseofulvin decreases effects of Saccharomyces boulardii by unspecified interaction mechanism. Avoid or Use Alternate Drug. Systemic or oral antifungals may decrease activity of probiotic.
- silodosin
griseofulvin will decrease the level or effect of silodosin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- simvastatin
griseofulvin will decrease the level or effect of simvastatin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- sirolimus
griseofulvin will decrease the level or effect of sirolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- tolvaptan
griseofulvin will decrease the level or effect of tolvaptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
- tucatinib
griseofulvin will increase the level or effect of tucatinib by Other (see comment). Avoid or Use Alternate Drug. Coadministration of tucatinib (a CYP2C8 substrate) with a strong or moderate CYP2C8 inhibitors increases tucatinib plasma concentrations and risk of toxicities.
- ulipristal
griseofulvin will decrease the level or effect of ulipristal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
Monitor Closely (113)
- almotriptan
griseofulvin will decrease the level or effect of almotriptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- alprazolam
griseofulvin will decrease the level or effect of alprazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- amiodarone
griseofulvin will decrease the level or effect of amiodarone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- amlodipine
griseofulvin will decrease the level or effect of amlodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- aprepitant
griseofulvin will decrease the level or effect of aprepitant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- aripiprazole
griseofulvin will decrease the level or effect of aripiprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- artemether/lumefantrine
griseofulvin will decrease the level or effect of artemether/lumefantrine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- aspirin
griseofulvin decreases levels of aspirin by unknown mechanism. Use Caution/Monitor.
- aspirin rectal
griseofulvin decreases levels of aspirin rectal by unknown mechanism. Use Caution/Monitor.
- aspirin/citric acid/sodium bicarbonate
griseofulvin decreases levels of aspirin/citric acid/sodium bicarbonate by unknown mechanism. Use Caution/Monitor.
- atogepant
griseofulvin will decrease the level or effect of atogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- atorvastatin
griseofulvin will decrease the level or effect of atorvastatin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- avanafil
griseofulvin will decrease the level or effect of avanafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. For patients with ED, monitor response carefully because of potential for decreased effectiveness.
- axitinib
griseofulvin decreases levels of axitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- balsalazide
griseofulvin decreases levels of balsalazide by unknown mechanism. Use Caution/Monitor.
- bazedoxifene/conjugated estrogens
griseofulvin will decrease the level or effect of bazedoxifene/conjugated estrogens by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- bexarotene
griseofulvin will decrease the level or effect of bexarotene by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- budesonide
griseofulvin will decrease the level or effect of budesonide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- buspirone
griseofulvin will decrease the level or effect of buspirone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- carbamazepine
griseofulvin will decrease the level or effect of carbamazepine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- choline magnesium trisalicylate
griseofulvin decreases levels of choline magnesium trisalicylate by unknown mechanism. Use Caution/Monitor.
- cilostazol
griseofulvin will decrease the level or effect of cilostazol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- cinacalcet
griseofulvin will decrease the level or effect of cinacalcet by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- clopidogrel
griseofulvin will increase the level or effect of clopidogrel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. CYP3A4 inducers may increase the metabolism of clopidogrel to its active metabolite. Monitor patients for potential increase in antiplatelet effects when CYP3A4 inducers are used in combination with clopidogrel
- clozapine
griseofulvin will decrease the level or effect of clozapine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- colchicine
griseofulvin will decrease the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- conivaptan
griseofulvin will decrease the level or effect of conivaptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- conjugated estrogens
griseofulvin will decrease the level or effect of conjugated estrogens by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- conjugated estrogens, vaginal
griseofulvin will decrease the level or effect of conjugated estrogens, vaginal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- cortisone
griseofulvin will decrease the level or effect of cortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- cyclosporine
griseofulvin will decrease the level or effect of cyclosporine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- darifenacin
griseofulvin will decrease the level or effect of darifenacin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- darunavir
griseofulvin will decrease the level or effect of darunavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- dasatinib
griseofulvin will decrease the level or effect of dasatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- dexamethasone
griseofulvin will decrease the level or effect of dexamethasone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- diazepam
griseofulvin will decrease the level or effect of diazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- dienogest/estradiol valerate
griseofulvin will decrease the level or effect of dienogest/estradiol valerate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Advise women to use alternative method of contraception or back-up method when moderate or weak enzyme inducer is used with combination contraceptives. Back-up contraception should be continued for 28 days after discontinuing medication to ensure contraceptive reliability.
- diflunisal
griseofulvin decreases levels of diflunisal by unknown mechanism. Use Caution/Monitor.
- diltiazem
griseofulvin will decrease the level or effect of diltiazem by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- eletriptan
griseofulvin will decrease the level or effect of eletriptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- erlotinib
griseofulvin will decrease the level or effect of erlotinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- estradiol
griseofulvin will decrease the level or effect of estradiol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- estrogens conjugated synthetic
griseofulvin will decrease the level or effect of estrogens conjugated synthetic by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- estrogens esterified
griseofulvin will decrease the level or effect of estrogens esterified by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- estropipate
griseofulvin will decrease the level or effect of estropipate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- etonogestrel
griseofulvin will decrease the level or effect of etonogestrel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- etravirine
griseofulvin will decrease the level or effect of etravirine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- exemestane
griseofulvin will decrease the level or effect of exemestane by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. For patients receiving exemestane with a potent CYP3A4 inducer the recommended dose of exemestane is 50 mg daily after a meal.
- felodipine
griseofulvin will decrease the level or effect of felodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- fesoterodine
griseofulvin will decrease the level or effect of fesoterodine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- fludrocortisone
griseofulvin will decrease the level or effect of fludrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- fosamprenavir
griseofulvin will decrease the level or effect of fosamprenavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- fosaprepitant
griseofulvin will decrease the level or effect of fosaprepitant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- hydrocortisone
griseofulvin will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- hydroxyprogesterone caproate (DSC)
griseofulvin will decrease the level or effect of hydroxyprogesterone caproate (DSC) by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- iloperidone
griseofulvin will decrease the level or effect of iloperidone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- indinavir
griseofulvin will decrease the level or effect of indinavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- ixabepilone
griseofulvin will decrease the level or effect of ixabepilone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- lapatinib
griseofulvin will decrease the level or effect of lapatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- levonorgestrel intrauterine
griseofulvin decreases levels of levonorgestrel intrauterine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- levonorgestrel oral
griseofulvin decreases levels of levonorgestrel oral by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- levonorgestrel oral/ethinylestradiol/ferrous bisglycinate
griseofulvin will decrease the level or effect of levonorgestrel oral/ethinylestradiol/ferrous bisglycinate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. The efficacy of hormonal contraceptives may be reduced. Use an alternative method of contraception or a backup method when enzyme inducers are used with combined hormonal contraceptives (CHCs), and continue backup contraception for 28 days after discontinuing enzyme inducer to ensure contraceptive reliability.
- linagliptin
griseofulvin will increase the level or effect of linagliptin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Use of alternative treatments is strongly recommended when linagliptin is to be administered with a CYP3A4 inducer
- lopinavir
griseofulvin will decrease the level or effect of lopinavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- loratadine
griseofulvin will decrease the level or effect of loratadine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- lumefantrine
griseofulvin will decrease the level or effect of lumefantrine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- maraviroc
griseofulvin will decrease the level or effect of maraviroc by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- mesalamine
griseofulvin decreases levels of mesalamine by unknown mechanism. Use Caution/Monitor.
- mestranol
griseofulvin will decrease the level or effect of mestranol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- methadone
griseofulvin will decrease the level or effect of methadone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- methoxsalen
methoxsalen, griseofulvin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Additive photosensitizing effects.
- methylprednisolone
griseofulvin will decrease the level or effect of methylprednisolone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- midazolam
griseofulvin will decrease the level or effect of midazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- nelfinavir
griseofulvin will decrease the level or effect of nelfinavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- nicardipine
griseofulvin will decrease the level or effect of nicardipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- nilotinib
griseofulvin will decrease the level or effect of nilotinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- nisoldipine
griseofulvin will decrease the level or effect of nisoldipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- paclitaxel
griseofulvin will increase the level or effect of paclitaxel by Other (see comment). Use Caution/Monitor. Paclitaxel levels/toxicity may increase when coadministered with CYP2C8 inhibitors
- paclitaxel protein bound
griseofulvin will increase the level or effect of paclitaxel protein bound by Other (see comment). Use Caution/Monitor. Paclitaxel levels/toxicity may increase when coadministered with CYP2C8 inhibitors
- pazopanib
griseofulvin will decrease the level or effect of pazopanib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- pegvaliase
pegvaliase, griseofulvin. Other (see comment). Use Caution/Monitor. Comment: The majority of patients treated with pegvaliase develop anti-polyethylene glycol (PEG) IgM and IgG antibodies. Risk of coadministration with different PEGylated products is unknown. There is a case report of anaphylaxis following a medroxyprogesterone acetate injectable suspension that contained PEG 3350. Carefully read all drug labels, including OTC drugs to check contents for PEG. Applies to ultramicrosized griseofulvin containing PEG 400 and 8000. Note: Unable to include an exhaustive product list for this interaction.
- porfimer
griseofulvin, porfimer. Mechanism: pharmacodynamic synergism. Use Caution/Monitor. Enhanced photosensitivity.
- prednisone
griseofulvin will decrease the level or effect of prednisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- quetiapine
griseofulvin will decrease the level or effect of quetiapine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- quinidine
griseofulvin will decrease the level or effect of quinidine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- repaglinide
griseofulvin will decrease the level or effect of repaglinide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- ritonavir
griseofulvin will decrease the level or effect of ritonavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- romidepsin
griseofulvin will decrease the level or effect of romidepsin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- salicylates (non-asa)
griseofulvin decreases levels of salicylates (non-asa) by unknown mechanism. Use Caution/Monitor.
- salsalate
griseofulvin decreases levels of salsalate by unknown mechanism. Use Caution/Monitor.
- saquinavir
griseofulvin will decrease the level or effect of saquinavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- selexipag
griseofulvin will increase the level or effect of selexipag by decreasing metabolism. Modify Therapy/Monitor Closely. Reduce selexipag dose to once daily if coadministered with moderate CYP2C8 inhibitors.
- sildenafil
griseofulvin will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- solifenacin
griseofulvin will decrease the level or effect of solifenacin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- sorafenib
griseofulvin decreases levels of sorafenib by increasing metabolism. Use Caution/Monitor.
- sulfasalazine
griseofulvin decreases levels of sulfasalazine by unknown mechanism. Use Caution/Monitor.
- sunitinib
griseofulvin will decrease the level or effect of sunitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- tacrolimus
griseofulvin will decrease the level or effect of tacrolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- tadalafil
griseofulvin will decrease the level or effect of tadalafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- tazemetostat
griseofulvin will decrease the level or effect of tazemetostat by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- temsirolimus
griseofulvin will decrease the level or effect of temsirolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- theophylline
griseofulvin will decrease the level or effect of theophylline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- tipranavir
griseofulvin will decrease the level or effect of tipranavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- tolterodine
griseofulvin will decrease the level or effect of tolterodine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- trazodone
griseofulvin will decrease the level or effect of trazodone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- triamcinolone acetonide injectable suspension
griseofulvin will decrease the level or effect of triamcinolone acetonide injectable suspension by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- triazolam
griseofulvin will decrease the level or effect of triazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- ubrogepant
griseofulvin will decrease the level or effect of ubrogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Dose adjustment is recommended with concomitant use of ubrogepant and moderate and weak CYP3A4 inducers. (see Dosage Modifications)
- vardenafil
griseofulvin will decrease the level or effect of vardenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- verapamil
griseofulvin will decrease the level or effect of verapamil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- voclosporin
voclosporin, griseofulvin. Either increases toxicity of the other by nephrotoxicity and/or ototoxicity. Modify Therapy/Monitor Closely. Coadministration with drugs associated with nephrotoxicity may increase the risk for acute and/or chronic nephrotoxicity.
- warfarin
griseofulvin will decrease the level or effect of warfarin by affecting hepatic enzyme CYP2C9/10 metabolism. Modify Therapy/Monitor Closely.
- willow bark
griseofulvin decreases levels of willow bark by unknown mechanism. Use Caution/Monitor.
Minor (60)
- alfentanil
griseofulvin will decrease the level or effect of alfentanil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- alfuzosin
griseofulvin will decrease the level or effect of alfuzosin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- alosetron
griseofulvin will decrease the level or effect of alosetron by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- amitriptyline
griseofulvin will decrease the level or effect of amitriptyline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- amobarbital
amobarbital decreases levels of griseofulvin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- armodafinil
griseofulvin will decrease the level or effect of armodafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- atazanavir
griseofulvin will decrease the level or effect of atazanavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- bortezomib
griseofulvin will decrease the level or effect of bortezomib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. Caution is advised with concurrent use.
- bosentan
griseofulvin will decrease the level or effect of bosentan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- butabarbital
butabarbital decreases levels of griseofulvin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- butalbital
butalbital decreases levels of griseofulvin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- cevimeline
griseofulvin will decrease the level or effect of cevimeline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- clarithromycin
griseofulvin will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- clomipramine
griseofulvin will decrease the level or effect of clomipramine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- dapsone
griseofulvin will decrease the level or effect of dapsone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- disopyramide
griseofulvin will decrease the level or effect of disopyramide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- docetaxel
griseofulvin will decrease the level or effect of docetaxel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- donepezil
griseofulvin will decrease the level or effect of donepezil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- dutasteride
griseofulvin will decrease the level or effect of dutasteride by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- efavirenz
griseofulvin will decrease the level or effect of efavirenz by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- eplerenone
griseofulvin will decrease the level or effect of eplerenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- eucalyptus
griseofulvin will decrease the level or effect of eucalyptus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- finasteride
griseofulvin will decrease the level or effect of finasteride by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- food
food increases levels of griseofulvin by enhancing GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- galantamine
griseofulvin will decrease the level or effect of galantamine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- imatinib
griseofulvin will decrease the level or effect of imatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- imipramine
griseofulvin will decrease the level or effect of imipramine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- isradipine
griseofulvin will decrease the level or effect of isradipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- itraconazole
griseofulvin will decrease the level or effect of itraconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- ketoconazole
griseofulvin will decrease the level or effect of ketoconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- levoketoconazole
griseofulvin will decrease the level or effect of levoketoconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- mestranol
griseofulvin decreases effects of mestranol by increasing metabolism. Minor/Significance Unknown. May also cause menstrual irregularities.
- montelukast
griseofulvin will decrease the level or effect of montelukast by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- nifedipine
griseofulvin will decrease the level or effect of nifedipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- nimodipine
griseofulvin will decrease the level or effect of nimodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- nitrendipine
griseofulvin will decrease the level or effect of nitrendipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- ondansetron
griseofulvin will decrease the level or effect of ondansetron by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- oxybutynin
griseofulvin will decrease the level or effect of oxybutynin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- paclitaxel
griseofulvin will decrease the level or effect of paclitaxel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- paclitaxel protein bound
griseofulvin will decrease the level or effect of paclitaxel protein bound by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- parecoxib
griseofulvin will decrease the level or effect of parecoxib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- pentobarbital
pentobarbital decreases levels of griseofulvin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- phenobarbital
phenobarbital decreases levels of griseofulvin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- pimozide
griseofulvin will decrease the level or effect of pimozide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- pioglitazone
griseofulvin will decrease the level or effect of pioglitazone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- primidone
primidone decreases levels of griseofulvin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- propafenone
griseofulvin will decrease the level or effect of propafenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- quinine
griseofulvin will decrease the level or effect of quinine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- ramelteon
griseofulvin will decrease the level or effect of ramelteon by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- saxagliptin
griseofulvin will decrease the level or effect of saxagliptin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- secobarbital
secobarbital decreases levels of griseofulvin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- sufentanil
griseofulvin will decrease the level or effect of sufentanil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- vinblastine
griseofulvin will decrease the level or effect of vinblastine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- vincristine
griseofulvin will decrease the level or effect of vincristine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- vincristine liposomal
griseofulvin will decrease the level or effect of vincristine liposomal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- vinorelbine
griseofulvin will decrease the level or effect of vinorelbine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- zaleplon
griseofulvin will decrease the level or effect of zaleplon by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- ziprasidone
griseofulvin will decrease the level or effect of ziprasidone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- zolpidem
griseofulvin will decrease the level or effect of zolpidem by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- zonisamide
griseofulvin will decrease the level or effect of zonisamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
Adverse Effects
Frequency Not Defined
Rash (most common)
Urticaria (most common)
Headache
Fatigue
Dizziness
Insomnia
Mental confusion
Photosensitivity
Nausea
Vomiting
Epigastric distress
Diarrhea
GI bleeding
Leukopenia
Hepatotoxicity
Proteinuria
Nephrosis
Oral thrush
Angioneurotic edema (rare)
Drug-induced lupuslike syndrome (rare)
Menstrual irregularities (rare)
Paresthesia (rare)
Postmarketing Reports
Severe skin reactions (eg, Stevens-Johnson syndrome, toxic epidermal necrolysis) and erythema multiforme
Liver toxicity
Warnings
Contraindications
Hypersensitivity
Porphyria
Hepatocellular failure
Pregnancy
Cautions
Severe skin reactions (eg, Stevens-Johnson syndrome, toxic epidermal necrolysis) and erythema multiforme reported, some resulting in hospitalization or death; discontinue if severe skin reaction occurs
Elevations in AST, ALT, bilirubin, and jaundice reported, some resulting in hospitalization or death; discontinue if jaundice occurs
Patients on prolonged therapy with any potent medication should be under close observation; periodic monitoring of organ system function, including renal, hepatic and hematopoietic, should be done
Pregnancy & Lactation
Pregnancy category: X; no adequate and well-controlled studies in pregnant women, but animal studies have shown embryotoxic and teratogenic effects
Lactation: Excretion in milk unknown; avoid use because of potential tumorigenicity
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
Fungistatic; deposited in keratin precursor cells and is tightly bound to new keratin, and this increases resistance to fungal invasion
Absorption
Absorption of ultramicrosize griseofulvin absorption is almost complete; absorption of microsize griseofulvin is variable (25-70% of oral dose); enhanced by ingestion of fatty meal (GI absorption of ultramicrosize is 1.5 times that of microsize)
Distribution
Drug crosses placenta
Metabolism
Extensively metabolized by liver; hepatic CYP3A4 induced
Elimination
Half-life: 9-22 hr
Excretion: Urine (<1% as unchanged drug), feces, perspiration
Images
| BRAND | FORM. | UNIT PRICE | PILL IMAGE |
|---|---|---|---|
| griseofulvin microsize oral - | 125 mg/5 mL suspension |  | |
| griseofulvin microsize oral - | 500 mg tablet |  | |
| griseofulvin microsize oral - | 125 mg/5 mL suspension |  | |
| griseofulvin microsize oral - | 500 mg tablet |  |
Copyright © 2010 First DataBank, Inc.
Patient Handout
griseofulvin microsize oral
GRISEOFULVIN - ORAL TABLET
(GRISS-ee-oh-FULL-vin)
COMMON BRAND NAME(S): Fulvicin, Grifulvin V, Gris-Peg, Grisactin
USES: This medication is used to treat fungal infections of the skin, hair, and nails that do not respond to creams/lotions. Clearing such infections will get rid of symptoms such as itching, red/peeling/scaly skin, and discolored nails. This medication works by stopping the growth of fungi. It does not treat infections due to bacteria or yeast.
HOW TO USE: Take this medication by mouth as directed by your doctor. For the best absorption, it is best taken with or after a meal containing a moderate amount of fat. Talk to your doctor or pharmacist about specific dietary instructions, especially if you are on a low-fat diet.The dosage is based on your medical condition and response to therapy. In children, dosage is also based on weight. The length of treatment depends on the type of infection you have. It may take several weeks to months to complete treatment for infections of the scalp, feet, and body. Nail infections may require several months to a year or longer to treat.Antifungal medications work best when the amount of medicine in your body is kept at a constant level. Take this drug at evenly spaced intervals.Continue to take this medication for the full prescribed length of treatment even if symptoms improve after a few days. Stopping the medication too early may allow the fungus to continue to grow, which may result in a relapse of the infection.Inform your doctor if your condition lasts or gets worse.
SIDE EFFECTS: Headache, nausea, vomiting, diarrhea, stomach upset, tiredness, dizziness, or trouble 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: numbness/tingling of the hands/feet, mental/mood changes (such as confusion, trouble doing normal activities), hearing changes, butterfly-shaped facial rash (around the nose and cheeks), joint/muscle pain, signs of liver disease (such as nausea/vomiting that doesn't stop, stomach/abdominal pain, yellowing eyes/skin, dark urine), signs of kidney problems (such as change in the amount of urine, frothy urine), signs of infection (such as sore throat that doesn't go away, fever).Use of this medication for prolonged or repeated periods may result in oral thrush or a new vaginal yeast infection (oral or vaginal fungal infection). Contact your doctor if you notice white patches in your mouth, a change in vaginal discharge, or other new symptoms.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: 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 griseofulvin, tell your doctor or pharmacist if you are allergic to it; 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: a certain blood disorder (porphyria), liver disease, lupus.This drug may make you dizzy or less alert. Alcohol or marijuana (cannabis) can make you more dizzy or much less alert. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Avoid alcoholic beverages while you are taking this drug unless your doctor gives permission. Drinking alcohol during treatment with this drug could result in a fast heartbeat and flushing of the skin. Talk to your doctor if you are using marijuana (cannabis).This medication may make you more sensitive to the sun. Limit your time in the sun. Avoid tanning booths and sunlamps. Use sunscreen and wear protective clothing when outdoors. Tell your doctor right away if you get sunburned or have skin blisters/redness.Tell your doctor if you are pregnant or plan to become pregnant. You should not become pregnant while using griseofulvin. Griseofulvin may harm an unborn baby. Ask about reliable forms of birth control while using this medication and for 1 month after the last dose. If you become pregnant, talk to your doctor right away about the risks and benefits of this medication. (See also Drug Interactions section.)The effects of this drug on human sperm are unknown. However, based on animal cell studies, the manufacturer recommends waiting for a period of time after completing griseofulvin treatment before trying to father a child. Discuss the risks and benefits with your doctor, and ask how long to wait after your last dose before trying to father a child.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 are: barbiturates (such as phenobarbital), warfarin.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. 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.
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.
NOTES: Do not share this medication with others.This medication has been prescribed for your current condition only. Do not use it later for another infection unless your doctor tells you to.Lab and/or medical tests (such as kidney/liver function, complete blood count) should be done while you are taking this medication. Keep all medical and lab appointments. Consult your doctor for more details.Ask your doctor or pharmacist about ways to control the infection and to prevent re-infection. Fungus spreads easily in warm, moist areas. Follow good hygiene (for example wash and dry the infected area completely, and do not share articles of clothing or objects that come in contact with the infected area).
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.
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 December 2022. Copyright(c) 2023 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.
