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Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

Seldane Patient Information Including Side Effects

Brand Names: Seldane

Generic Name: terfenadine (Pronunciation: ter FEN a deen)

What is terfenadine (Seldane)?

Terfenadine was withdrawn from the U.S. market in 1998.

Terfenadine is an antihistamine. Antihistamines prevent sneezing, runny nose, itching and watering of the eyes, and other allergic symptoms.

Terfenadine is used to treat allergies, hives (urticaria), and other allergic inflammatory conditions.

Terfenadine may also be used for purposes other than those listed in this medication guide.

What are the possible side effects of terfenadine (Seldane)?

If you experience any of the following serious side effects, stop taking terfenadine and call your doctor immediately or seek emergency medical attention.

  • an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives);
  • an irregular heartbeat; or
  • seizures.

If you experience any of the following less serious side effects, continue taking terfenadine and talk to your doctor:

  • drowsiness or dizziness;
  • headache;
  • nervousness;
  • nausea, diarrhea, or abdominal discomfort;
  • dry mouth; or
  • dry skin or itchiness.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

Read the Seldane (terfenadine (removed from market 1998)) Side Effects Center for a complete guide to possible side effects

What is the most important information I should know about terfenadine (Seldane)?

Terfenadine was withdrawn from the U.S. market in 1998.

Do not take terfenadine with any of the following medicines: the antifungal drugs ketoconazole (Nizoral) or itraconazole (Sporanox); the antibiotics erythromycin (E.E.S., E-Mycin, Ery-Tab), clarithromycin (Biaxin), or azithromycin (Zithromax); or the ulcer drug cimetidine (Tagamet, Tagamet HB). A dangerous drug interaction could occur.

Side Effects Centers

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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