cyclosporine
noun [ U ] medical US specialized (UK ciclosporin); (also UK cyclosporin) uk/ˌsaɪ.kləˈspɔː.rɪn/ us/ˌsaɪ.kləˈspɔːr.ɪn/
环孢菌素（一种抗排异反应的药）
an immunosuppressant drug (= a drug used to deliberately stop the body's immune system from working)
Cyclosporine is used to prevent the rejection of transplanted organs. 环孢菌素用于抑止器官移植的排异反应。