Acyclovir cream is a commonly used topical drug in dermatology, the main ingredient is acyclovir, and the excipients are petroleum jelly and glycerin. Acyclovir is a synthetic purine nucleoside antiviral drug. Its mechanism of action is to interfere with the viral DNA polymorphase and inhibit the replication of the virus, and has an inhibitory effect on herpes simplex virus, varicella zoster virus, cytomegalovirus, etc. Acyclovir ointment is used to treat the following diseases: 1, herpes simplex virus infection: for herpes simplex. type 1 and type 2 infections. 2.Herpes zoster infection. 3. Treatment of varicella in immunodeficient individuals. Dosage: Every 3 hours, 6 times a day for 7 days for both adults and children. Adverse reactions: Mild pain, burning, tingling, itching and rash are seen. Acyclovir ointment is a topical drug. To improve the therapeutic effect, oral acyclovir tablets are added at the same time as topical application in clinical practice. Caution: 1. If symptoms are not relieved after 7 days of continuous use, please seek medical advice. 2.This product is only for skin mucous membrane, not for eye use. 3. Wear finger gloves or gloves when applying the drug. 4.Pregnant women and nursing mothers should use with caution. 5.It is prohibited for those who are allergic to this product, and it should be used with caution for those who are allergic.