May 29, 2017
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(anthralin) Topical Cream

Important Information about Dritho-Scalp®

Warning - Dritho-Scalp® can cause severe irritation. Be careful to keep off skin not affected by psoriasis. Rinse immediately after 5 minutes or the amount of time your doctor prescribed. If irritation occurs, discontinue use and call your doctor. Keep away from eyes.

Caution - Dritho-Scalp® can permanently stain clothing and bathroom fixtures. Dritho-Scalp will also stain skin, but skin staining is temporary. Use only old clothing and old towels and linens when using Dritho-Scalp. Any clothing or linens that come in contact with Dritho-Scalp may become permanently stained. Rinse all bathroom fixtures immediately and thoroughly.


Dritho-Scalp® is a pale yellow topical cream containing 0.5% anthralin USP in a base of white petrolatum, mineral oil, sodium lauryl sulfate, cetostearyl alcohol, ascorbic acid, salicylic acid, methylparaben and purified water. The chemical name of anthralin is l,8-dihydroxy-9- anthrone. The structural formula is:

Dritho-Scalp (anthralin) Structural Formula Illustration

What are the precautions when taking anthralin (Dritho-Scalp)?

Before using anthralin, tell your doctor or pharmacist if you are allergic to it; or to preservatives (e.g., parabens); or if you have any other allergies. This product may contain other inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease.

To prevent staining of clothing or bed linen, a protective dressing may be useful. To prevent staining of the tub or shower (after washing off the medicine), rinse tub/shower with lukewarm water. Then use a cleanser to remove any deposits left on the surface.

During pregnancy, this medication should be used only when clearly needed. Discuss the risks and...

Read All Potential Precautions of Dritho-Scalp »

Last reviewed on RxList: 12/8/2016
This monograph has been modified to include the generic and brand name in many instances.

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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