The active ingredient is fexofenadine HCl 180 milligrams, which provides relief for a full day. In the event that another nasal decongestant doesn’t work, Dr. Betts suggests trying Allegra.
Fexofenadine HCl 180mg, pseudoephedrine HCl 240mg; ext-rel tabs. See Contraindications. Avoid concomitant aluminum- or magnesium-containing antacids. Pseudoephedrine: Antagonizes antihypertensives.