Paracetamol is a commonly used anti-allergic drug in clinic, if the patient is suffering from nasal congestion caused by allergic rhinitis, this drug can be applied for treatment, the main ingredient is chlorpheniramine maleate, which can effectively play an anti-allergic effect, and has a very good curative effect on allergic rhinitis, including allergic dermatitis, urticaria, etc., but there are certain adverse reactions, such as a depressant effect on central nervous system, patients will experience fatigue, dizziness, especially want to sleep, and in serious cases, gastrointestinal disorders, as well as blood disorders, it is recommended to drink more water to promote absorption of drugs. After using the drug, the patient will experience fatigue, dizziness, especially want to sleep, and in serious cases, gastrointestinal disorders, and blood disorders, it is recommended to drink more water to promote the absorption and metabolism of drugs after using the drug. For patients with nasal congestion, you can also spray with tretinoin nasal spray together to treat, life is recommended to exercise more, improve resistance.