Objective To investigate whether promethazine has the effect of preemptive analgesia.

目的研究异丙嗪是否具有超前镇痛作用。

youdao

Objective To investigate whether promethazine has the effect of preemptive analgesia.

目的研究异丙嗪是否具有超前镇痛作用。

youdao