Tacrotor 0.1% Ointment 10 gm contains the active substance Tacrolimus. It is an immunosuppressant that belongs to the class of medications called calcineurin inhibitors. This capsule is used along with other medicines to prevent organ transplant rejection in people receiving liver, kidney, heart, or other transplants. It is also indicated to control your body’s immune response, enabling it to accept the transplanted organ. Do not take this capsule if you are allergic to tacrolimus or any of the other ingredients of this medicine.  Report your physician if you are allergic to any antibiotic group. Inform your doctor if you have had a liver or heart disease before initiating the treatment. Notify your physician immediately if you develop fever, bruising under the skin (which may appear as red dots), unexplained tiredness, confusion, yellowing of the skin or eyes, reduced urine output, vision loss, and seizures after taking this medicine. Limit exposure to sunlight and UV light while consuming tacrolimus by wearing appropriate protective clothing and sunscreen with a high sun protection factor. This is because of the potential risk of malignant skin changes with immunosuppressive therapy. This medicine may cause diarrhoea; inform your physician if you have diarrhoea for over a day. If you need to receive any vaccinations, consult your doctor once before accepting them.