Cetirizine drops, its main ingredient is cetirizine hydrochloride, with appropriate excipients to make a solution. Cetirizine is an anti-allergy drug, a second generation H1 antihistamine, which is a long-acting, selective, oral potent anti-allergy drug. The most common adverse effects are sedation, headache, dry mouth, fatigue and nausea, and are contraindicated during pregnancy as well as in lactating patients. It is commonly used clinically for the treatment of allergic rhinitis and other allergic diseases such as acute and chronic allergic reactions of the skin, eyes, and respiratory tract.