Vaciclovir hydrochloride tablets are a commonly used antiviral drug that is used to treat herpes simplex virus infections as well as for the prevention or suppression of herpes simplex virus infections and recurrences. So it can be used for the treatment of male genital herpes infection and for the prevention of recurrence after the infection. Of course it also has some liver and kidney impairment and is not recommended for patients with more severe liver and kidney insufficiency. Common adverse reactions include headache, nausea, etc. Leukopenia, thrombocytopenia, allergic reactions, neurological and psychiatric impairment are very rare clinically.