Fexofenadine is both an over-the-counter and a prescription medication used to relieve the allergy symptoms of seasonal allergic rhinitis. It is also used to relieve symptoms of urticaria (hives) such as red, itchy raised areas of the skin, including itching and rash .
Fexofenadine is in a class of medications called antihistamines. These works by blocking the effects of histamine, a substance in the body that causes allergy symptoms.
Fexofenadine comes as a tablet, an orally disintegrating tablet, and a suspension (liquid) to take by mouth. It is usually taken with water once or twice a day.
Common side effects of fexofenadine include headache, back pain, cough, diarrhea, and fatigue.
Fexofenadine can also cause dizziness. Do not drive or operate heavy machinery until you know how fexofenadine affects you.