Herpes simplex infections
200 mg 5 times daily for 5-10 days. Suppression of herpes simplex infections
200 mg 2-5 times daily for up to 6-12 mth or 400 mg bd. Prophylaxis of herpes simplex infections in immune-compromised patient
200 mg qds, may be doubled in severely immune-compromised patient or patient w/ impaired gut absorption. Varicella & herpes zoster infections
800 mg 5 times daily for 7-10 days.