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Tersi Foam

Generic name: selenium sulfide topical

Brand names: Dandrex, Selsun Blue 2 in 1, Selsun Blue Balanced Treatment, Selsun Blue Medicated Treatment, Selsun Blue Moisturizing Treatment, SelRx, Tersi Foam

Last updated November 3, 2026 0 views
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What is Tersi Foam?

Selenium sulfide is a medicine that fights fungus. It stops fungus from growing on your skin.

Tersi Foam (for the skin) is used to treat dandruff, seborrhea, and tinea versicolor (a fungus that causes skin discoloration).

Tersi Foam may also be used for other reasons that are not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

Warnings

Follow all instructions on your medicine label and package. Inform each of your healthcare providers about all your medical conditions, allergies, and all medicines you are taking.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

You should not use Tersi Foam if you are allergic to selenium sulfide.

FDA pregnancy category C. It is not known if Tersi Foam will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medication.

It is not known if selenium sulfide topical passes into breast milk or if it could harm a nursing baby. Tell your doctor if you are breast-feeding a baby.

Tersi Foam should not be used on a child younger than 2 years old without a doctor's advice.

This section was rewritten for readability and reviewed for meaning.

Tersi Foam side effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop using selenium sulfide and call your doctor if you have unusual or severe blistering, itching, redness, peeling, dryness, or irritation of treated skin.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

This section was rewritten for readability and reviewed for meaning.

How should I use Tersi Foam?

Use this medicine exactly as directed on the label, or as prescribed by your doctor. Do not use it in larger amounts or for longer than recommended.

Shake the selenium sulfide foam, lotion, or shampoo well just before each use.

Wash your hands after applying the foam or lotion.

Rinse the shampoo thoroughly. Do not leave it in your hair for an extended period of time. Tersi Foam shampoo is generally not for daily use. Follow the directions on the label, or your doctor's instructions.

Use this medication for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared.

Call your doctor if your symptoms do not improve, or if they get worse while using Tersi Foam.

Do not cover treated skin with a bandage or other dressing unless your doctor has told you to. A light cotton-gauze bandage may be used to protect clothing.

Store at room temperature away from moisture and heat. Keep the foam canister away from open flame, and do not puncture the can.

What happens if I miss a dose?

Apply the missed dose as soon as you remember. If it is nearly time for your next dose, wait until then to use the medicine and skip the missed dose. Do not apply extra medicine to make up for the missed dose.

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

An overdose of Tersi Foam is not expected to be dangerous. Seek emergency medical help or call the Poison Help line at 1-800-222-1222 if anyone has accidentally swallowed the medication.

Do not get Tersi Foam in your eyes, nose, mouth, rectum, or vagina. If it does get into any of these areas, rinse with water. Never use Tersi Foam on sunburned, windburned, dry, chapped, or broken skin.

Avoid covering treated skin areas with tight, synthetic clothing that doesn’t allow air to circulate. Wear loose-fitting clothing made of cotton and other natural fibers until your infection is healed.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect Tersi Foam?

Avoid using other topical medications while you use Tersi Foam, unless your doctor says it's okay. Other skin medications may change how well selenium sulfide topical works or how much your skin absorbs.

This section was rewritten for readability and reviewed for meaning.

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.