Do NOT use Grifulvin V if:

• you are allergic to any ingredient in Grifulvin V
• you have severe liver disease or the blood disease porphyria
• you are pregnant

Contact your doctor or health care provider right away if any of these apply to you.

Some medical conditions may interact with Grifulvin V. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

• if you are pregnant, planning to become pregnant, or are breast-feeding
• if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
• if you have allergies to medicines, foods, or other substances
• if you have diabetes, liver disease, lupus, or numbness of the hands or feet.

Some medicines may interact with Grifulvin V. Tell your health care provider if you are taking any other medicines, especially any of the following:

• Barbiturates (eg, phenobarbital) because they may decrease effectiveness
• Anticoagulants (eg, warfarin), cyclosporine, or oral contraceptives (birth control pills) because their effectiveness may be decreased by Grifulvin V.

This may not be a complete list of all interactions that may occur. Ask your health care provider if Grifulvin V may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

Important safety information:

• Grifulvin V may cause dizziness. This effect may be worse if you take it with alcohol or certain medicines. Use Grifulvin V with caution. Do not drive or perform other possible unsafe tasks until you know how you react to it.
• Be sure to use Grifulvin V for the full course of treatment. If you do not, the medicine may not clear up your infection completely. The fungus could also become less sensitive to this or other medicines. This could make the infection harder to treat in the future.
• Do not drink alcohol while you are taking Grifulvin V.
• Grifulvin V may cause you to become sunburned more easily. Avoid the sun, sunlamps, or tanning booths until you know how you react to Grifulvin V. Use a sunscreen or wear protective clothing if you must be outside for more than a short time.
• It is important to practice good hygiene during and after use to prevent reinfection.
• Hormonal birth control (eg, birth control pills) may not work as well while you are using Grifulvin V. To prevent pregnancy, use an extra form of birth control (eg, condoms).
• Use an effective form of birth control for 6 months after using Grifulvin V.
• Lab tests, including complete blood cell counts, liver function, and kidney function, may be performed while you use Grifulvin V. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
• Grifulvin V should be used with extreme caution in children younger than 3 years old; safety and effectiveness in these children have not been confirmed.
• Pregnancy and breast-feeding: Do not use Grifulvin V if you are pregnant. Avoid becoming pregnant while you are taking it. If you think you may be pregnant, contact your doctor right away. If you are or will be breast-feeding while you use Grifulvin V, check with your doctor. Discuss any possible risks to your baby.

All medicines may cause side effects, but many people have no, or minor, side effects.

Check with your doctor if any of these most common side effects persist or become bothersome:

Diarrhea; difficulty sleeping; dizziness; fatigue; headache; nausea; stomach upset; vomiting.

Seek medical attention right away if any of these severe side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); confusion; numbness of tingling of the hands or feet; white patches in the mouth.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider.