Cetrine (Cetirizine) is a non-drowsy antihistamine used for the relief of the symptoms of hay fever (seasonal allergic rhinitis) and allergies such as dust or pet allergies (perennial allergic rhinitis) and rashes associated with hives and itching (chronic idiopathic urticaria). Symptoms relieved can include sneezing, runny or blocked nose, red or watery eyes and red, itchy skin.