Griseofulvin (By mouth)
Treats various types of fungus infections such as ringworm, "jock itch," and athlete's foot. Belongs to a class of drugs called antifungals.
Grifulvin V, Gris-PEG, Griseofulvin Ultramicrosize, Fulvicin P/G
There may be other brand names for this medicine.
When This Medicine Should Not Be Used
You should not use this medicine if you have had an allergic reaction to griseofulvin or penicillin, or if you are pregnant. Do not use this medicine if you have liver failure or an enzyme problem called porphyria.
How to Use This Medicine
Capsule, Liquid, Tablet
- Your doctor will tell you how much of this medicine to use and how often. Do not use more medicine or use it more often than your doctor tells you to.
- You may take your medicine with food or milk to avoid stomach irritation.
- You may swallow the tablets whole or sprinkle the crushed tablets in one tablespoonful of applesauce. Swallow it immediately without chewing.
- Measure the oral liquid medicine with a marked measuring spoon, oral syringe, or medicine cup.
- Keep yourself clean to help control infection and prevent reinfection.
- Keep using this medicine for the full treatment time, even if you feel better after the first few doses. Your infection may not clear up if you stop using the medicine too soon.
If a dose is missed:
- If you miss a dose or forget to use your medicine, use it as soon as you can. If it is almost time for your next dose, wait until then to use the medicine and skip the missed dose. Do not use extra medicine to make up for a missed dose.
How to Store and Dispose of This Medicine
- Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
- Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any outdated medicine or medicine no longer needed.
- Keep all medicine away from children and never share your medicine with anyone.
Drugs and Foods to Avoid
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
- Make sure your doctor knows if you are using a blood thinner (such as warfarin, Coumadin®), phenobarbital (Luminal®), or birth control pills.
- Birth control pills with estrogen may not work as well while taking griseofulvin. To keep from getting pregnant, use another form of birth control along with your birth control pills. Other forms include condoms, a diaphragm, or a contraceptive foam or jelly.
- Do not drink alcohol while you are using this medicine.
Warnings While Using This Medicine
- Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to keep from getting pregnant. If you think you have become pregnant while using the medicine, tell your doctor right away.
- Make sure your doctor knows if you are breastfeeding, or if you have liver disease, lupus erythematosus, or lupus-like diseases.
- Serious skin reactions can occur with this medicine. Stop using this medicine and check with your doctor right away if you have blistering, peeling, or loosening of the skin; red skin lesions; severe acne or skin rash; sores or ulcers on the skin; or fever or chills while you are using this medicine.
- Stop using this medicine and check with your doctor right away if you have pain or tenderness in the upper stomach; pale stools; dark urine; loss of appetite; nausea; unusual tiredness or weakness; or yellow eyes or skin. These could be symptoms of a serious liver problem.
- This medicine may make your skin more sensitive to sunlight. Use a sunscreen when you are outdoors. Avoid sunlamps and tanning beds.
- This medicine may make you dizzy or drowsy. Avoid driving, using machines, or doing anything else that could be dangerous if you are not alert.
- If your symptoms do not improve or if they get worse, call your doctor.
Possible Side Effects While Using This Medicine
Call your doctor right away if you notice any of these side effects:
- Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
- Blistering, peeling, or red skin rash.
- Cloudy urine.
- Dark-colored urine or pale stools.
- Fast, pounding, or uneven heartbeat.
- Fever, chills, cough, sore throat, and body aches.
- Nausea, vomiting, loss of appetite, or pain in your upper stomach.
- Numbness, tingling, or burning pain in your hands, arms, legs, and feet.
- Unusual bleeding, bruising, or weakness.
- Warmth or redness in your face, neck, arms, or upper chest.
- White spots on the tongue or inside the cheeks.
- Yellowing of the skin and the whites of your eyes.
If you notice these less serious side effects, talk with your doctor:
- Diarrhea, heartburn, or stomach upset.
- Headache or dizziness.
- Mild skin rash or itching.
- Sensitivity of the skin to sunlight.
- Trouble sleeping.
If you notice other side effects that you think are caused by this medicine, tell your doctor
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088
- Last Reviewed on 06/12/2013
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This page was last updated: June 18, 2013