What is Cetirizine Hydrochloride and How Does it Work? Cetirizine hydrochloride is a second-generation antihistamine medication used to treat various allergic conditions, such as hay fever, allergic rhinitis, and urticaria. It belongs to the class of drugs known as piperazine derivatives and works by blocking the action of histamine, a chemical released by the body during an allerg... https://articlescad.com/cetirizine-hydrochloride-a-comprehensive-guide-to-the-popular-antihistamine-241441.html