Definition: any natural or artificially made chemical which is used as a medicine Level: B2
止痛药通常在手术后使用。
Pain-killing ___drugs are commonly used after surgery.
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.
他因为病情服用几种药物。
He takes several ___drugs for his condition.
