Clarinase Repetabs combine two active ingredients: an antihistamine and a decongestant. The antihistamine helps reduce allergy or common cold symptoms by blocking the effects of histamine, a substance produced by the body during allergic reactions. The decongestant works to clear nasal congestion, providing relief from a stuffy nose. Clarinase Repetabs is an effective solution for treating both allergy symptoms and nasal congestion, helping you breathe easier and feel better.