Imuran is a potent immunosuppressant medication used in the treatment of various autoimmune diseases. Each tablet contains 50 mg of the active ingredient azathioprine, which works by suppressing the immune system to reduce inflammation and prevent the body from attacking its own tissues. Azathioprine is metabolized in the body to produce 6-mercaptopurine, which interferes with the synthesis of DNA and RNA in rapidly dividing cells, including those of the immune system. This mechanism helps to control the overactive immune response seen in autoimmune conditions. Imuran is commonly prescribed for conditions such as rheumatoid arthritis, lupus, inflammatory bowel disease, and organ transplant rejection prevention. It is essential to follow your healthcare provider's instructions carefully when taking Imuran to achieve the best results and minimize potential side effects.