Acyclovir Tablets are an antiviral medication used to treat infections caused by certain viruses, including herpes simplex (cold sores, genital herpes), varicella-zoster (chickenpox), and shingles. They work by interfering with the virus's ability to replicate, thereby reducing symptoms and aiding in faster recovery. The typical dosage varies depending on the infection and patient condition, but it's commonly taken several times a day for a specified period. It’s important to complete the full course of medication, even if symptoms improve. Possible side effects include nausea, diarrhea, and dizziness. Always use as directed by a healthcare provider to ensure effectiveness and minimize side effects.