Are Fexofenadine Hydrochloride Drowsy?

Fexofenadine is known as a non-drowsy antihistamine. It's less likely to make you feel sleepy than some other antihistamines.

Should fexofenadine be taken in the morning or at night?

Should I take Allegra (fexofenadine) at night or in the morning? If you are taking a 12 hour form of Allegra (fexofenadine), it can be taken once in the morning and once in the evening. If you are taking an Allegra (fexofenadine) once-a-day 24 hour tablet, it can be taken at any time of the day.

Why does fexofenadine not cause drowsiness?

Because it acts on peripheral histamine receptors, fexofenadine is much less likely to cause drowsiness compared with some older antihistamines.