医生警告说，长期使用麻醉剂可能导致依赖。

The doctor warned that prolonged use of ___narcotics could lead to dependence.

热水澡的温暖有一种麻醉般的效果，让他感到昏昏欲睡且放松。

The warmth of the hot bath had a ___narcotic effect, making him feel drowsy and relaxed.