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Drug class: topical antifungals

What is Extina?

Extina foam is antifungal and prevents the growth of fungus on your skin.Extina Foam can be applied topically to the skin of patients aged 12 and older in order to treat a skin disorder called seborrheic dermatitis. Seborrheic dermatitis is characterized by areas of flaky (scaly) skin on the scalp, face, and ears. It can also affect the chest, upper back, or chest.Extina foam can be used in other ways not mentioned in this guide.

Side effects of Extina

If you experience any of the following symptoms of an allergic reaction: hives, difficulty breathing, swelling of the face, lips, or throat, or hives, seek emergency medical attention.

If you experience:

  • After using this medication, you may experience severe burning, stinging, or irritation.
  • Redness, pain, or oozing on the treated skin
  • Shortness of breath

Extina may cause side effects such as:

  • Hair loss is a common problem.
  • Changes in your hair's color or texture;
  • Dry skin
  • Mild itching

There may be other side effects. For medical advice on side effects, call your doctor. Reaching out to the FDA in regards to side effects can be done at 800-FDA-1088.


Extina should be taken for the entire prescribed time. You may experience some improvement in symptoms before your condition is fully resolved.Use bandages and dressings only if your doctor tells you to.Do not get this medication into your eyes, mouth, nose, or other sensitive areas.Extina Foam should be stopped immediately if there is severe irritation, burning, pain, or redness where it has been applied.Extina foam can ignite. Use it only when you are not smoking or close to an open flame.This medication should not be used on children younger than 12 years of age.

Before you take this drug

Extina Foam should not be used if you have an allergy to ketoconazole.

If you suffer from:

  • Asthma or sulfite allergies;
  • An allergic reaction to antifungal medicines such as Clotrimazole or Econazole

Consult your doctor before taking this medication if you're pregnant.

Extina should not be used while breastfeeding.Follow the directions on the label of this medicine when using it on a child.

Similar/related drugs

prednisone, dexamethasone, hydrocortisone topical, topical nystatin, clotrimazole topical, ketoconazole topical, and terbinafine

How to take Extina?

Extina foam should be applied exactly as directed. For 4 weeks, the foam is applied twice a day to the affected areas (once in the morning and once in the evening). If your skin doesn't improve after four weeks, you should consult your doctor.

  1. The can should be held at an angle.
  2. Extina Foam can be sprayed directly onto the cap or any other surface that is cool. Spray only enough foam to cover the affected area. Spray the foam onto your hands or affected skin, but not directly on your skin. It will melt immediately when it touches the skin.
  3. Rinse your hands in cold water if they are still warm. Dry your fingers well before using Extina Foam. If the foam seems warm or runny, place the can in cool running water for several minutes.
  4. Massage the foam gently into the affected area until it disappears.
  5. Move any hair from the area you want to treat, such as the scalp.
  6. Extina foam should not be used in the mouth, eyes, or vagina. Rinse the foam out of your mouth, eyes, or vagina if it gets into these areas.
  7. After using Extina, wash your hands thoroughly.

Extina should not be used to treat skin conditions that have not been examined by a doctor.Store Extina at room temperature, away from moisture or heat. Extina should not be placed in the freezer or refrigerator.Extina Foam can ignite. Smoking is not allowed while using the foam spray or can. Do not spray the foam can near fires, open flames, or direct heat. Even if it is empty, never throw the can in a fire. Avoid leaving the can out in direct sunlight.If your symptoms don't improve within 2 to 4 weeks or if they worsen, call your doctor.

What happens if I miss the dose?

If it is almost time for your next dose, take only that which you are due. In other words, skip any missed ones altogether. Never take two doses of the same medicine at once.

What happens if I overdose?

Overdoses of ketoconazole are not dangerous. If anyone accidentally swallows the medication, call 1-800-222-1222 or seek emergency medical care.

What should be avoided?

Avoid getting this medicine into your eyes. Rinse with water if you do.Wear loose-fitting cotton clothing to cover treated skin. Avoid wearing synthetic clothing, such as nylon or polypropylene, that prevents air from reaching your skin. When treating your feet, you should wear sandals or shoes with air circulation and clean cotton socks. Your feet should remain as dry as possible.If you have pityriasis, it is important to avoid the sun. You should follow your doctor's advice.Avoid skin products that can cause irritation. These include harsh soaps and shampoos, permanent hair dyes or chemicals, hair removal or waxes, as well as skin products containing alcohol, spices, astringents, or lime.Do not use other medications to treat the same areas that you have treated with Extina unless you are told to by your doctor.

Interaction with other drug

Other drugs that you take are unlikely to affect the medicine applied to your skin. Many drugs interact with each other. Inform your healthcare provider about the medicines you take, including prescriptions and over-the-counter medicines, vitamins, and herbal products.