Allegra (fexofenadine), a new nonsedating antihistamine

You'll see a flurry of ads for Allegra (fexofenadine), a new nonsedating antihistamine...from the same manufacturer as Seldane.

Fexofenadine is just terfenadine carboxylate...the active metabolite of Seldane (terfenadine).

Allegra will be promoted as safer...because fexofenadine doesn't cause arrhythmias like terfenadine.

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