ImportantThis page is general information, not a prescription. Don't start, stop, or change a medicine without talking to your provider or pharmacist.
Overview
Treatment lasts 6 to 8 weeks or more.
What it's used for
- Scalp ringworm (tinea capitis)
- Some other fungal skin infections
How to take it
- Take it with a fatty food, like whole milk or ice cream, to absorb it.
Your dose depends on your health and other medicines. Always follow your prescription label, and ask your pharmacist if anything is unclear.
Side effects
Common side effects
- Headache
- Upset stomach
- Sun sensitivity
Call 911A blistering, peeling, or widespread red rash, especially with fever
Call your provider todayYellow skin or eyes, dark urine, or pain in the upper right belly
Warnings
- It may make birth control less effective.
- Men should avoid fathering a child during and for 6 months after.
Other medicines, foods, and alcohol
- It lowers warfarin and birth control effects.
- Alcohol may cause flushing.
Tell your provider and pharmacist about every medicine, vitamin, and supplement you take.
Pregnancy and breastfeeding
Not used in pregnancy.
Missed doses, overdose, and storage
If you miss a dose
Take it as soon as you remember, unless it's almost time for your next dose. Then skip the missed dose. Don't take two doses at once.
If someone takes too much
Call Poison Control at 1-800-222-1222 or get help online at poison.org. Call 911 if the person collapses, has a seizure, has trouble breathing, or can't be woken.
Storing it
Store at room temperature, away from heat and moisture (not in the bathroom), and out of reach of children and pets.
Conditions it's used for
Sources
- DailyMed: FDA drug label for Griseofulvin (U.S. National Library of Medicine)
- MedlinePlus: Drugs, herbs, and supplements
- FDA: Drugs@FDA
Last updated 2026-11-13.