Famciclovir tablets are effective and useful for the treatment of primary genital herpes, herpes zoster and other viral infections of the skin. Famciclovir Tablets belong to the diacetyl-6-deoxy analog of Famciclovir, after taking the drug, the drug will be converted into Penciclovir in the body, which is able to inhibit the replication and synthesis of herpes virus. Famciclovir tablets can be used to treat viral infectious skin diseases caused by primary genital herpes and herpes zoster. ADVERSE REACTIONS: Common adverse reactions are headache and nausea, in addition to dizziness, insomnia, somnolence, abnormal sensations, diarrhea, abdominal pain, dyspepsia, anorexia, vomiting, constipation, flatulence, fatigue, pain, fever, chills, rash, pruritus, sinusitis, pharyngitis, and other adverse reactions can be seen. Contraindication: It is contraindicated for those who are allergic to famciclovir. Precautions: The efficacy of famciclovir in preventing recurrence of genital herpes, ocular herpes zoster, disseminated herpes zoster and herpes in immunodeficient patients has not been confirmed. This product may interact with other drugs whose metabolism is catalyzed by aldehyde oxidase. Famciclovir Tablets should be used under medical supervision.