Cetirizine Hydrochloride Tablets are a class of potent antihistamines, mainly used for the treatment of rhinitis and so on. Cetirizine Hydrochloride Tablets is a second-generation antihistamine with certain anti-inflammatory effects, including the inhibition of adhesion factor, leukotrienes, 5-hydroxytryptamine and platelet-activating substances, etc. It is mainly used for the treatment of perennial allergic rhinitis, seasonal rhinitis, allergic conjunctivitis, etc.; this kind of drug has a fast onset of action, and it can significantly alleviate the itching of the nose, sneezing, sniffing, itching of the eyes and so on. The drug is used for children over 6 years of age and adults; adults usually take 1 tablet at bedtime, or half a tablet in the morning and half a tablet in the evening if the condition is serious. Children aged 6-12 years can take 1 tablet once a day or half a tablet twice a day. This product is contraindicated in patients with hypersensitivity, severe hepatic or renal impairment, and rare hereditary lactose intolerance. Common adverse reactions include headache, dizziness, drowsiness, agitation, and dry mouth. If patients need to take Cetirizine Hydrochloride Tablets, please strictly follow the doctor’s instructions to regulate the use of medication.