Gavir 250 Capsule is an antiviral medicine used to treat viral infections caused by cytomegalovirus 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. Gavir 250 Capsule should be taken in the dose and duration as advised by your doctor. Do not skip any doses and finish the full course of treatment even if you feel better. It should be taken with food for better absorption. If you miss a dose, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular schedule. Do not double the dose. You should drink plenty of water while on treatment with this medicine as it helps to prevent dehydration and kidney damage. Some side effects of this medicine include headache, dizziness, vomiting, nausea, fatigue, and fever. 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.