Acyclovir Ointment is a white ointment, which is a topical drug. The main ingredient of the drug is acyclovir, and the excipients are petroleum jelly and glycerin, etc. It is suitable for herpes simplex and herpes zoster virus infections. The mechanism of action of acyclovir ointment is to interfere with the DNA polymutase of the virus, thereby inhibiting viral replication, and has an inhibitory effect on herpes simplex virus, varicella-zoster virus, and cytomegalovirus. It can be used during the daytime for adults and children 4-6 times a day for 7 days. Side effects of pain, itching and rash may occur in individual cases during application. This product should be used with caution in pregnant and lactating women, and must be used under adult supervision when applied to children.