Allegra For Dogs. It can be given once a day and often has the same effect as benadryl (which really needs to be given 3 times daily). These can cause itchy skin, a stuffy nose, and sneezing.
Fexofenadine hydrochloride) is a second generation antihistamine which is formulated to treat allergies in humans. Allegra, which contains the active ingredient fexofenadine, is a second generation antihistamine. Get information tailored to adult indoor and outdoor allergy relief.