immunosuppressant

例句：

1. 1. The patient was given an immunosuppressant to prevent rejection of the transplanted organ.
   患者被给予一种免疫抑制剂以防止移植器官的排斥。
2. 2.The doctor prescribed an immunosuppressant for the patient's severe allergic reaction.
   医生为患者的严重过敏反应开了一种免疫抑制剂。
3. 3.The immunosuppressant was effective in reducing the patient's immune system response to the treatment.
   这种免疫抑制剂有效地降低了患者对治疗的免疫系统反应。