ALLEGRA 120MG TABS is an antihistamine medication used to treat symptoms of allergies such as sneezing, runny nose, itching, and watery eyes. It works by blocking the action of histamine, a substance in the body that causes allergic symptoms. ALLEGRA 120MG TABS is typically taken once daily and may take a few days to start working. It is important to follow the dosage instructions provided by your healthcare provider and not to exceed the recommended dose. Common side effects may include drowsiness, headache, and dry mouth. If you experience any severe side effects or allergic reactions, seek medical attention immediately.