Acyclovir usage: 1, tablets: for the initial treatment of genital herpes and immunodeficient persons with cutaneous mucosal herpes simplex, it is recommended to administer 200mg once, 5 times a day for 10 days or 200mg once, 3 times a day for 5 days; if treating recurrent infections or chronic suppressive therapy, 200mg can be administered orally every 8 hours for 6 months, and if necessary the dose can be increased to 5 times a day, each time 200mg for 6 months; for the treatment of herpes zoster, the usual adult dose is 800mg once, 5 times a day for 7-10 days; 2. Injectable, each intravenous drip for more than 1 hour, adults are usually given 5mg/kg by weight, every 8 hours by sedation, 3 times a day for 5 days; for the treatment of patients with severe immune deficiency, 5-10mg/kg can be given 3 times a day administered by titration every 8 hours.