Takfa 1 mg Capsules Takfa 1 mg contains tacrolimus, an immunosuppressive medicine used to reduce excessive immune activity after organ transplantation. It helps prevent the immune system from recognizing a transplanted organ as foreign and attacking it. Tacrolimus is commonly used as part of a combination treatment following kidney, liver, or heart transplantation. Because the amount of medicine in the blood needs to remain within a specific range, treatment is usually accompanied by regular blood-level and organ-function monitoring.