Nizoral 200mg (Ketoconazole)

Nizoral is a broad-spectrum antifungal medication used to treat fungal infections of the skin, scalp, and internal organs. It is available in oral and topical forms.

Nizoral 200mg (Ketoconazole)
Nizoral 200mg (Ketoconazole) – visual reference

What is Nizoral?

Nizoral (ketoconazole) is an antifungal medication used to treat a variety of fungal and yeast infections affecting the skin, scalp, and internal organs. Available in both oral and topical forms, Nizoral provides broad-spectrum coverage against dermatophytes and Candida species. It is commonly prescribed for athlete’s foot, ringworm, seborrheic dermatitis, and severe fungal infections that affect internal systems.

The oral tablet form, containing 200mg of ketoconazole, is typically reserved for moderate to severe infections where topical therapy is ineffective. Due to the potential for liver toxicity, its use is generally limited to infections that cannot be treated by safer antifungal agents. Topical Nizoral remains a widely used and effective over-the-counter solution for dandruff and fungal scalp irritation.

In the U.S., patients may buy Nizoral online through licensed telehealth platforms that offer prescriptions after a remote consultation. Generic ketoconazole is available as a cheap and effective alternative. Consumers are advised to avoid offshore sources that do not comply with FDA regulations or offer products without valid prescriptions.

How It Works

Nizoral works by disrupting the synthesis of ergosterol, a vital component of fungal cell membranes. By inhibiting the cytochrome P450 enzyme 14α-demethylase, ketoconazole prevents the production of this compound, compromising membrane integrity and causing fungal cell death. This mechanism makes it effective against both dermatophytes and yeasts.

For topical use, ketoconazole reduces fungal growth on the skin and scalp, alleviating flaking, redness, and itching. When taken orally, Nizoral reaches systemic circulation and is distributed throughout body tissues, making it useful in treating chronic and deep-seated fungal infections that topical agents cannot reach.

The medication typically begins to relieve symptoms within several days of use, though full eradication of the fungus may require several weeks of consistent treatment. For best results, Nizoral should be taken with food to enhance absorption, and patients must complete the full course to avoid recurrence.

Dosage Information

Dosage may vary based on severity and treatment response.

Side Effects

Oral Nizoral is associated with both common and serious side effects. The most frequently reported include nausea, abdominal discomfort, headache, dizziness, and rash. These tend to be mild and resolve as treatment continues or ends.

More serious adverse effects include elevated liver enzymes, hepatitis, and rare cases of acute liver failure. For this reason, liver function tests should be conducted before and during treatment. Signs of liver toxicity include yellowing of the skin or eyes, dark urine, and fatigue.

Topical forms of Nizoral (e.g., shampoo or cream) are generally well tolerated but may cause localized burning, irritation, or redness, especially with prolonged use. Discontinue use if skin reactions worsen.

Warnings & Interactions

Oral Nizoral should only be used when alternative antifungal therapies are unavailable or inappropriate due to the risk of severe liver injury. It is contraindicated in patients with existing liver disease or hypersensitivity to ketoconazole or its ingredients.

Ketoconazole interacts with many medications, including statins, certain antihistamines, benzodiazepines, and anticoagulants. These interactions may lead to serious side effects or reduced efficacy of other drugs. Always inform your healthcare provider of all current medications before starting Nizoral.

Pregnant or breastfeeding women should consult their doctor before using Nizoral. Its safety profile in pregnancy is not well established, particularly for oral use.

To safely buy Nizoral online, use U.S.-licensed platforms that offer prescriptions after professional review. Avoid purchasing cheap ketoconazole from unregulated foreign websites that do not follow FDA safety standards.

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Frequently Asked Questions

Yes. Nizoral is effective against Candida species causing skin or mucosal yeast infections.

Yes. Nizoral shampoo is often used for dandruff and seborrheic dermatitis of the scalp.

Long-term use of oral Nizoral is not recommended without close medical monitoring due to liver risks.

Treatment typically lasts 2 to 6 weeks depending on the type and severity of infection.

Yes. Nizoral shampoo is available OTC, but oral Nizoral tablets (ketoconazole) require a prescription.

Nizoral is used to treat fungal infections such as athlete's foot, seborrheic dermatitis, dandruff, ringworm, and systemic fungal infections.

It may interact with many drugs. Inform your doctor about all medications you take before starting Nizoral.

Yes. You can buy Nizoral tablets or shampoo online through licensed pharmacies or telehealth providers in the U.S.

Yes. Oral Nizoral may cause nausea, headache, liver enzyme changes, or more rarely, serious liver injury.

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This page was last medically reviewed: June 2025

Use Nizoral under medical supervision, especially when taken orally due to potential liver effects.

Medical Disclaimer

This website provides informational overviews of medications and does not offer medical advice, diagnosis, or treatment. Always consult a licensed healthcare provider before starting or changing any medication.