Stavudine Hydrochloride Tablets is an H1 receptor antagonist, which is a commonly used antihistamine in clinical practice. Stavudine hydrochloride tablets are commonly used clinically to treat acute and chronic urticaria, acute and chronic allergic reactions, perennial allergic rhinitis and other diseases. The drug needs to be taken under medical supervision, and is contraindicated for children under three years of age, elderly patients with liver and kidney dysfunction, and pregnant and lactating women. Allergic diseases lead to the release of a large number of histamine mediators from the skin, causing bronchospasm, increased vascular permeability, as well as erythema, wind spots, inducing a feeling of intense itching. By oral administration of stavudine hydrochloride, it can inhibit bronchospasm and increased vascular permeability caused by the release of histamine, and also relieve the symptoms associated with allergy. The drug is taken with less affective properties on the central nervous system and has fewer side effects on the body.