医生建议我在睡前服用一片苯海拉明来帮助入睡。

The doctor suggested taking one ___diphenhydramine tablet before bed to help me sleep.

这种感冒药含有苯海拉明，能缓解夜间咳嗽和鼻塞。

This cold medicine contains ___diphenhydramine to relieve nighttime coughing and congestion.

长途旅行前，我会服用一些苯海拉明来预防晕车。

Before long trips, I take some ___diphenhydramine to prevent motion sickness.