Miconazole

Miconazole, sold under the brand name Monistat among others, is an antifungal medication used to treat ring worm, pityriasis versicolor, and yeast infections of the skin or vagina. It is used for ring worm of the body, groin (jock itch), and feet (athlete's foot). It is applied to the skin or vagina as a cream or ointment.

Miconazole
Clinical data
Trade namesDesenex, Monistat, Oravig, others
AHFS/Drugs.comMonograph
MedlinePlusa601203
Routes of
administration
Topical, vaginal, sublabial
ATC code
Legal status
Legal status
  • AU: S2 (Pharmacy medicine) Schedule 2 for topical formulations, schedule 3 for vaginal use and for oral candidiasis, otherwise schedule 4
  • UK: POM (Prescription only)
  • US: OTC / Rx-only
Pharmacokinetic data
Bioavailability<1% after application to the skin
Protein binding88.2%
MetabolismCYP3A4
Elimination half-life20–25 hrs
ExcretionMainly feces
Identifiers
  • (RS)-1-(2-(2,4-Dichlorobenzyloxy)-2-(2,4-dichlorophenyl)ethyl)-1H-imidazole
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
CompTox Dashboard (EPA)
ECHA InfoCard100.041.188
Chemical and physical data
FormulaC18H14Cl4N2O
Molar mass416.12 g·mol−1
3D model (JSmol)
ChiralityRacemic mixture
  • Clc1cc(Cl)ccc1C(Cn2ccnc2)OCc3ccc(Cl)cc3Cl
  • InChI=1S/C18H14Cl4N2O/c19-13-2-1-12(16(21)7-13)10-25-18(9-24-6-5-23-11-24)15-4-3-14(20)8-17(15)22/h1-8,11,18H,9-10H2 Y
  • Key:BYBLEWFAAKGYCD-UHFFFAOYSA-N Y
  (verify)

Common side effects include itchiness or irritation of the area in which it was applied. Use in pregnancy is believed to be safe for the baby. Miconazole is in the imidazole family of medications. It works by decreasing the ability of fungi to make ergosterol, an important part of their cell membrane.

Miconazole was patented in 1968 and approved for medical use in 1971. It is on the World Health Organization's List of Essential Medicines.

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