Children with runny nose are usually caused by upper respiratory tract infections or allergies, commonly used drugs are compound aminophenol mesylate syrup, cetirizine hydrochloride syrup and so on. 1. Cotrimoxazole syrup: used to relieve upper respiratory tract infections caused by fever, headache, limb pain, sneezing, runny nose, nasal congestion, cough, cough phlegm, sore throat and other symptoms. Sometimes there are mild dizziness, fatigue, nausea, epigastric discomfort, dry mouth, lack of appetite and rash, etc., which can be recovered by themselves; patients with hepatic or renal insufficiency are prohibited. 2. Cetirizine Hydrochloride Syrup: This product is an antihistamine, which can relieve the symptoms of sneezing, runny nose and nasal congestion caused by allergic rhinitis. Adverse reactions are mild and transient, including drowsiness, somnolence, headache, dizziness, agitation, dry mouth and gastrointestinal discomfort. It is contraindicated in patients who are allergic to the product. Children with nasal discharge, snot and nasal congestion should be diagnosed by a physician and instructed to use medication, not self-medication, to avoid adverse results. The above medication should be used in accordance with medical advice.