The indication for tacrolimus is the prevention of graft rejection after liver or kidney transplantation. The more common side effects are mainly: cardiac: ischemic coronary artery disease, tachycardia. Hematologic: anemia, leukopenia, thrombocytopenia. Nervous system: tremor, headache, impaired consciousness, vertigo. Eye: blurred vision, photophobia, eye discomfort. Ear: tinnitus. Respiratory system: dyspnea, pleural effusion, cough. Digestive system: diarrhea, nausea, vomiting. Urinary system: kidney injury, kidney failure. Skin and subcutaneous tissue: hair rash, hair loss. Skeletal muscle: arthralgia, muscle spasm, limb pain. Metabolic and nutritional: diabetes mellitus, electrolyte disorders, hyperlipidemia. Vascular: hypertension, bleeding, thrombosis. Immune system: allergy. Hepatobiliary: abnormal liver function, cholestasis, jaundice. Mental: insomnia, anxiety, depression, depression, etc.