Based on the information posted on drugs.com, Anti-thymocyte globulin is “a sterilized solution made of the cells of rabbits that have been injected with white blood cells from humans.” What this product basically does is lower the body’s immune system, thereby preventing it from rejecting a kidney transplant. For those who are not fully aware of how the immune system works, not only does this system fight infections, but it also treats any new organ as an invader. Therefore, lowering the immune system makes it easier for the body to accept this new organ. Bear in mind that Anti-thymocyte globulin is usually used together with other medicines to perform the aforementioned task. You should tell your doctor if you have a serious infection called “sepsis” before using this medication in order to make sure that it’ll be completely safe for you to use it. Also remember to tell your healthcare provider if you are pregnant or if you plan on becoming pregnant, because it is actually still unknown whether Anti-thymocyte globulin could harm an unborn child. However, this product passes into breast milk, and, according to drugs.com, it could harm a nursing baby. So, make sure you consult your doctor about using Anti-thymocyte globulin while breastfeeding, too. As for the side effects, drugs.com states that “serious and sometimes fatal infections may occur during treatment with anti-thymocyte globulin”. Other serious side effects such as white patches inside the mouth or on the lips, unusual bleeding, swollen glands, and dry cough, can also occur.