The cetirizine and Zyrtec are two popular antihistamines that are widely used for the treatment of allergic reactions. These medications are particularly effective in alleviating hay fever, skin rashes, and other allergic symptoms. Allergic reactions can include itching, sneezing, runny nose, and itchy eyes, all of which can disrupt our daily lives. Antihistamines, such as cetirizine, block the effects of histamine in the body, thereby reducing the aforementioned symptoms. Cetirizine: A thorough understanding of the active ingredient Cetirizine is an antihistamine classified as a second-generation antihistamine. This means that cetirizine has fewer side effects compared to first-generation antihistamines like diphenhydramine. Cetirizine reduces allergic reactions by blocking histamine H1 receptors, which…