Treatment of herpes zoster
1 g tds for 7 days. Immunocompromised patient
1 g tds for 7 days & for 2 days following crushing of lesions. Treatment of herpes simplex
500 mg bd; recurrent episodes: 3-5 days, initial episodes: 10 days. Immunocompromised patient
1 g bd for 5 days. Treatment of cold sores
2 g bd for 1 day, 2nd dose in the 12 hr (no sooner than 6 hr) after 1st dose.