FK506 (Tacrolimus)

FK506, commonly known as Tacrolimus, is a medication that suppresses the immune system to prevent the body from rejecting transplanted organs like kidneys or liver. It works by inhibiting certain immune cells, reducing the body's attack on the new organ. Tacrolimus is carefully dosed by doctors to balance preventing rejection while minimizing side effects like infection risk. It is an essential drug for transplant recipients but requires regular monitoring to ensure safety and effectiveness.