Acivir 500 Infusion is an antiviral medicine. It helps in treating viral infections like herpes labialis, herpes simplex virus infections, shingles, genital herpes infection, and chickenpox. It prevents the multiplication of viruses in human cells and therefore helps in clearing the infection. Acivir 500 Infusion is administered as an injection by a healthcare professional. Kindly do not self-administer. It is given by slow intravenous (I.V.) infusion over a 1-hour period to avoid damage to kidneys. You should drink plenty of water while on treatment with this medicine as it helps to prevent dehydration and kidney damage. Some side effects include vomiting, nausea, and increased liver enzymes. You may also notice some injection site reactions like pain, swelling, or redness. Inform your doctor if these side effects persist for a longer duration. Please consult your doctor if you are pregnant, planning to conceive, or breastfeeding.