Active Ingredient

Ketoconazole

Ketoconazole is an antifungal medication used to treat a variety of fungal infections. It is effective in managing infections that affect the skin and other parts of the body.

This medication is typically prescribed when other treatments have not worked or are not suitable.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Ketoconazole Brands

Nizoral

Strengths 200mg

Nizoral Shampoo

Strengths 200ml 1%

Ketoconazole Cream

Strengths 2% 15 g

K-Pet

Strengths 200 mg

Ketoconazole Uses

Ketoconazole is commonly used to treat fungal infections in different parts of the body. It helps in controlling the growth of fungi, providing relief from symptoms.

Fungal infections of the skin
Yeast infections
Scalp infections
Ringworm
Jock itch
Athlete’s foot

How Ketoconazole Works

Ketoconazole works by interfering with the cell membranes of fungi, which are essential for their survival. It inhibits the production of ergosterol, a key component of fungal cell membranes.

This disruption leads to the death of the fungal cells, helping to eliminate the infection.

By targeting the cell membrane, Ketoconazole effectively stops the growth and spread of fungi.

Common side effects of Ketoconazole

Not everyone experiences side effects from Ketoconazole, and many side effects are mild and temporary. However, some people may notice certain common reactions.

Nausea
Headache
Dizziness
Stomach pain
Itching or rash
Diarrhea
Changes in taste

If you experience serious or persistent symptoms, contact your healthcare provider.

Inform your doctor about any other medications you are taking to avoid potential interactions.
Avoid consuming alcohol while using Ketoconazole, as it may increase the risk of liver problems.
Do not use this medication if you have a history of liver disease without consulting a doctor.
Monitor for any unusual symptoms and report them to your healthcare provider promptly.
Store the medication as directed and keep it out of reach of children.

Always consult your healthcare provider for personalized advice and information regarding your treatment.

Frequently Asked Questions

What conditions does Ketoconazole treat?

Ketoconazole is used to treat various fungal infections, including those affecting the skin, scalp, and nails.

How long does it take for Ketoconazole to work?

The time it takes to see improvement varies, but some people may notice relief within a few days. Complete treatment may take longer.

Is Ketoconazole safe for long-term use?

Long-term use of Ketoconazole should be monitored by a healthcare provider to manage potential risks, especially concerning liver health.

Can Ketoconazole interact with other medications?

Yes, Ketoconazole can interact with other medications. It’s important to inform your doctor about all the medicines you are taking.

What should I do if I miss a dose of Ketoconazole?

If you miss a dose, take it as soon as you remember. If it’s almost time for the next dose, skip the missed dose and continue with your regular schedule.