butorphanol

例句：

1. 1. The doctor administered butorphanol to the patient for pain relief.
   医生给病人注射了布托品以缓解疼痛。
2. 2. Butorphanol is a powerful anesthetic that can be used to treat severe pain.
   布托品是一种强效麻醉药，可用于治疗严重疼痛。
3. 3. The patient was given butorphanol intravenously to ensure rapid onset of anesthesia.
   患者通过静脉注射布托品以确保迅速进入麻醉状态。