immunosuppressant medications used primarily to prevent organ rejection after a kidney, heart, or liver transplant. They work by weakening the body's immune system so it does not attack the new organ. Key Characteristics Usage
Mechanism: It is an antimetabolite drug that inhibits an enzyme necessary for the de novo synthesis of guanosine nucleotides. This action specifically targets T and B lymphocytes, which are the white blood cells responsible for immune responses and are highly dependent on this specific synthesis pathway for proliferation.
Indication: It is indicated for the prophylaxis (prevention) of organ rejection and is used in combination with other medications, typically cyclosporine and corticosteroids. It may also be used to treat certain autoimmune diseases like lupus nephritis under a doctor's guidance.