Which medication is known to suppress the immune system to prevent kidney rejection?

Cyclosporine is a medication specifically designed to suppress the immune system to prevent organ rejection, particularly in kidney transplant recipients. This immunosuppressive drug works by inhibiting the activity of T-lymphocytes, which are crucial for the immune response that can lead to rejection of transplanted organs. By dampening this immune response, cyclosporine helps ensure that the body does not recognize the transplanted kidney as foreign, thereby significantly decreasing the risk of rejection.

In contrast, the other medications listed serve different purposes. Ibuprofen is an anti-inflammatory drug used primarily for pain relief and to reduce inflammation, but it does not have immunosuppressive properties. Amoxicillin is an antibiotic used to treat bacterial infections and also does not play a role in immune suppression. Paracetamol, also known as acetaminophen, is primarily used for pain relief and fever reduction and has no significant effect on the immune system. Therefore, cyclosporine stands out as the appropriate choice for its specific use in preventing kidney rejection through immune suppression.