The scientific name of paracetamol is chlorpheniramine maleate, which is an anti-allergic drug, it belongs to the first generation of antihistamines, so it can antagonize the capillary dilatation induced by histamine, thus reducing the permeability of capillaries, and it has an anti-allergic effect. It is mainly used for the treatment of skin allergy symptoms, such as urticaria, eczema, itchy skin, neurodermatitis, solar dermatitis, mosquito bites and other rashes, etc. It is also used for the treatment of allergic rhinitis and allergy symptoms caused by food and drugs. Paracetamol has a central inhibitory effect, so its side effects include drowsiness, thirst, etc. It is easy for patients to feel sleepy, weak, palpitations, etc. Therefore, after taking paracetamol, patients are not allowed to drive or work at heights.