drug

这是处方药，所以你不能在柜台直接购买。

This is a prescription ___drug, so you can't buy it over the counter.

这种药需要医生处方才能购买。

You need a prescription to buy this ___drug.

医生不得不给躁动的病人用药以使他平静下来。

The doctor had to ___drug the agitated patient to calm him down.