under supervision of a physician

• 在医师监视下； 遵医嘱

under supervision of a physician的用法和样例：

例句

1. This drug should only be taken under the supervision of a doctor.
   此药须遵医嘱服用。
2. The administration of oxygen requires a physician's order except in an emergency.
   除紧急情况外，输氧需遵医嘱。