The generic name of paracetamol is chlorpheniramine maleate, which is an H1 receptor antagonist, a commonly used antiallergic drug, the 1st generation of antiallergic drugs, commonly used in skin allergies: urticaria, eczema, drug rash, neurodermatitis, etc., and also used in allergic rhinitis and so on. Adverse reactions: the main adverse reactions are drowsiness, thirst, polyuria, sore throat, drowsiness, skin bruises, bleeding tendency. Contraindications: It is forbidden for those who are allergic to this product, and it is forbidden when the properties of this product have changed. Precautions: Elderly patients should be used under the guidance of a physician; not to drive a machine, car, ship, engage in aerial work and operation of precision instruments during the drug; newborns and premature infants should not be used; pregnant women and lactating mothers should be cautious; glaucoma, peptic ulcer, hypertension, prostate hypertrophy should be used with caution. It is recommended that patients should use this drug under the guidance of a doctor and avoid self-medication.