Acyclovir is a medication that contains 200 mg of the active ingredient, designed for the treatment of viral infections. It is commonly used to manage conditions caused by certain viruses, including herpes simplex and varicella-zoster. Indications: Herpes simplex virus infections, including genital herpes and cold sores Varicella (chickenpox) Herpes zoster (shingles) Prophylactic use in immunocompromised patients to prevent herpes simplex reactivation Off-label Uses: Epstein-Barr virus-associated conditions Cytomegalovirus prophylaxis in certain cases Bell's palsy (as part of combination therapy) Dosage and Administration: For Herpes Simplex Infections: Adults typically take 200 mg five times a day at 4-hour intervals, omitting the night dose, for 5–10 days. For Varicella (Chickenpox): 800 mg four times a day for 5 days, preferably started within 24 hours of rash onset. For Herpes Zoster (Shingles): 800 mg five times a day for 7–10 days, ideally started within 72 hours of rash onset. Tablets should be taken with a full glass of water, with or without food. For best results, take the medication at evenly spaced times. Note: Dosage may vary based on patient condition, kidney function, and specific clinical situation. Always consult with a healthcare professional before use to ensure it is appropriate for your specific condition.