Tacrol 1mg Capsule is used along with other medicines to prevent your body from rejecting a new organ (e.g., liver, kidney, or heart) after transplant. It does so by weakening your body’s immune system, so it does not attack the new organ. This medication belongs to a class of drugs known as immunosuppressants. The amount of Tacrol 1mg Capsule you take and how often you take it depends on the type of transplant you have, your body weight, and what other medicines you are taking. Follow your doctor’s instructions carefully. You should take it on an empty stomach, at least 1 hour before or 2 hours after a meal. Take this medicine regularly to get the maximum benefit and keep taking it, even if you feel well. If you stop taking it, you may increase the chances of rejecting your transplanted organ. Tacrol 1mg Capsule has many potential side effects. It can cause or worsen diabetes and kidney and liver problems. These need urgent medical attention. Other common side effects include nausea, stomach pain, diarrhea, and difficulty sleeping. If the side effects do not go away or get worse, tell your doctor. Tacrol 1mg Capsule lowers your immune system making you susceptible to catching more infections than usual. Before taking this medicine, tell your doctor if you have kidney, liver, or heart problems, diabetes, or high blood pressure. Also let your doctor know what other medications you are taking, especially for infections, pain, and arthritis. These and others may affect, or be affected by, this medicine. You should limit your exposure to the sun and UV (ultraviolet) light while taking it because immunosuppressants could increase your risk of skin cancer. Both men and women using this medicine should use effective birth control to prevent pregnancy. This medicine is not normally recommended during pregnancy or while breastfeeding unless it is clearly needed. Before and during treatment you will need frequent medical tests to monitor your progress, and your blood pressure will need to be checked often.