Yes, Tacrolimus is a type of antibiotic which belongs to a group called macrolides. It is mostly used after organ transplantation. This medicine’s immune-suppressing property helps prevent organ rejection after kidney, heart, or liver transplant.

You should be aware that this medicine can lower the ability of your immune system to fight infections and hence there is always an increased risk of infection. Moreover, in some cases, Tacrolimus can increase the risk of cancers like skin and lymph gland cancer (lymphoma). Hence, before starting the medication consult your doctor. Additionally, let your doctor know if you notice any symptoms of infections like fever, sweats or chills, cough or flu-like symptoms, muscle aches, warm, red or painful areas on your skin.

You should avoid taking any live vaccines (vaccines that use pathogens that are still alive, but are attenuated, that is, weakened) while taking Tacrolimus. These may include vaccinations for measles, mumps, rubella, BCG (TB vaccine), yellow fever, chicken pox and typhoid. You should also avoid taking polio drops (by mouth) or flu vaccine (through nose).

Before taking Tacrolimus, inform your doctor if you are pregnant, have allergies, long-term infection, high blood sugar, or high blood pressure. You should also inform your doctor if you have high blood potassium levels or a weakened immune system. Make your doctor aware in case you have a history of any medication, have recently received or are scheduled to receive a live vaccine.

As compared to other immune-suppressing medicines, Tacrolimus has been found to be a safe and effective short-term treatment for atopic dermatitis. When applied on the affected part of the skin, its absorption to the blood and body is minimal. Hence, the side effects are less as compared to when taken through oral route.

No, Tacrolimus does not have abuse potential and thus, is not a controlled substance. Controlled substances have potential for abuse so they need permission from authorities and doctors for use.