How should acyclovir be used?
Acyclovir comes as an ointment for use on the skin and as a tablet, capsule, and liquid to take by mouth. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take acyclovir exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor. Use acyclovir as soon as possible after symptoms appear. Clean and dry the skin area before applying the ointment.