Terfenadine tablets are different from loratadine. Terfenadine is an anti-allergy drug, a first-generation antihistamine, mainly used for the treatment of seasonal and perennial allergic rhinitis and urticaria, etc. It is in the same class as paracetamol and reserpine, and belongs to the first generation of antihistamines. It is the same class of drugs as paracetamol and reserpine, and belongs to the first generation of antihistamines. This drug has more obvious side effects, including drowsiness and, rarely, a tendency to cause abnormal heart function, and is now less commonly used. Loratadine belongs to the second generation of antihistamines, with relatively fewer cardiac side effects, and can be used in over-the-counter anti-allergy treatment in otorhinolaryngology and dermatology, mainly for seasonal and perennial allergic rhinitis, including allergic conjunctivitis, skin allergy, urticaria, etc.