Opium is classed under the head of narcotic.

鸦片是归入麻醉剂一类东西。

Conclusion Mepivacaine is an effective, safe and reliable anesthetic agent for dentistry and oral surgery.

结论甲哌卡因是一种安全可靠、麻醉效果好口腔局部麻醉剂。

The anaesthetist gave the patient an anaesthetic.

麻醉师给病人施麻醉剂。

The potent and rapid-acting opiates (fentanyl, sufentanil, alfentanil) can be used as the sole induction agents in cardiovascular surgery where hemodynamic stability is critical.

（太、叔太、太）强效快速起作啡类药物，由于其对血液动力学稳定可作为心脏手术单独诱导麻醉剂。

Results It showed the changes of field potentials and neural firing rates in hippocampal CA1 region tinder anesthetization of Pentobarbital sodium and Urethane respectively.

(2)海马CA1区神经元在不同麻醉剂作下放电频率变化具有规律性。