Terfenadine tablets are not recommended for long-term use. This drug is not hormonal and is mainly used clinically for the treatment of seasonal allergic rhinitis, perennial allergic rhinitis, chronic urticaria and other allergic diseases. It is not clinically recommended for long-term use. If patients take the drug for a long time, it may cause certain damage to various body systems, and some patients may suffer from headache, dizziness and other central nervous system discomfort when taking it for a long time. Some patients may develop malignant arrhythmias, such as atrial fibrillation, supraventricular tachycardia, ventricular tachycardia, heart failure and other related types of diseases, and some patients may develop angina pectoris and other manifestations of coronary heart disease after using it for a long time. Some patients may experience gastrointestinal discomfort after using it, with discomfort such as stomach pain, bloating, stomach acidity and hiccups. Some patients may experience clinical symptoms such as dry mouth and drowsiness after taking it.