Natclovir 500mg Injection is an antiviral medicine used to treat viral infections caused by cytomegalovirus (CMV) in immunocompromised people who have undergone an organ or bone marrow transplantation. It also reduces the risk of blindness in a serious eye infection caused by CMV, known as CMV retinitis. Natclovir 500mg Injection is administered as an injection by a healthcare professional. Kindly do not self-administer. It is given by slow intravenous (IV) infusion over a 1-hour period to avoid damage to the 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.