You should not use griseofulvin if you have porphyria or liver failure.
Taking griseofulvin during the first 3 months of pregnancy may harm the unborn baby.
Before taking this medicine
You should not use griseofulvin if you are allergic to it, or if you have:
liver failure;
porphyria (a genetic enzyme disorder that causes symptoms affecting the skin or nervous system); or
if you are pregnant or may become pregnant.
Tell your doctor if you have ever had:
liver disease;
lupus; or
an allergy to penicillin.
Taking griseofulvin during the first 3 months of pregnancy may cause birth defects. Do not take  griseofulvin if you are pregnant. Use effective birth control to prevent pregnancy while you are using this medicine.
Griseofulvin can make birth control pills less effective. Ask your doctor about using a non-hormonal birth control (condom, diaphragm, cervical cap, or contraceptive sponge) to prevent pregnancy.
You should not breastfeed while using griseofulvin.
Griseofulvin is not approved for use by anyone younger than 2 years old.
