Cymevene, also known by its generic name ganciclovir, is an antiviral medication primarily used in the treatment and prevention of infections caused by cytomegalovirus (CMV) in individuals with weakened immune systems, such as organ transplant recipients and those with HIV/AIDS. It works by inhibiting the replication of viral DNA, thereby reducing the spread of the virus within the body. Cymevene can be administered intravenously or in the form of an oral capsule, depending on the specific needs and condition of the patient. Due to its potent antiviral properties, it plays a crucial role in managing CMV infections, which can be life-threatening for individuals with compromised immune systems. However, it is associated with several potential side effects, including bone marrow suppression and renal toxicity, necessitating careful monitoring by healthcare professionals during treatment.