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Important Note

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.


(seh-LEE-nee-um SUL-fide)

COMMON BRAND NAME(S): Dandrex, Exsel, Selsun Blue


This medication is used to treat dandruff; a certain scalp infection (seborrheic dermatitis); and for a condition that discolors the skin (tinea versicolor).

How To Use

This medication is for topical use only. Avoid getting this near the eyes. If this does get in the eyes, rinse them thoroughly with clear water. Do not use this medication on cut or irritated skin. For use in dandruff or scalp dermatitis, wash hair first with regular shampoo. Shake lotion well. Massage the lotion into wet scalp and allow it to remain for 2 to 3 minutes. Rinse thoroughly and repeat. Begin with 2 applications per week, then reduce to weekly or every other week applications to maintain control. For skin infections, apply lotion to affected area. Lather with a small amount of water. Allow to remain on skin for 10 minutes. Rinse thoroughly. Repeat once a day for 7 days. Do not let selenium sulfide touch inflamed, raw skin. Rinse genital areas and skin folds thoroughly after contact with selenium sulfide. Do not leave selenium sulfide on your hair, scalp, or skin for long periods (e.g., overnight) because it is irritating. Rinse off all of the lotion.

Side Effects

This medication may cause skin irritation, dry skin, or hair loss. If any of these effects persist or worsen, discontinue use and consult your doctor. If you notice other effects not listed above, contact your doctor or pharmacist.


Do not use this medication without first contacting your doctor if you have the following conditions: inflamed or damaged skin. Avoid getting selenium sulfide in your eyes. If the medication gets into your eyes accidentally, rinse them with clear water for several minutes. Do not use this medication on children younger than two years of age without a doctor's permission. Selenium sulfide should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor. It is not known if this drug is excreted into breast milk. Though there have been no reports (to date) of harm to nursing infants, consult your doctor before breast-feeding.

Drug Interactions

If you use other topical products (prescription or nonprescription), consult your doctor before using selenium sulfide. Do not start or stop any medicine without doctor or pharmacist approval.


If overdose is suspected, contact your local poison control center or emergency room immediately. This medicine may be harmful if swallowed.


Remove jewelry before using this medication to avoid damage.

Missed Dose

Apply any missed dose as soon as possible but not if it is almost time for the next dose. If it is time for the next dose, skip the missed dose and resume your regular schedule. Do not double the dose to catch up.


Store at room temperature and in a tight container. Do not freeze.