处方药的英文是：prescription。
例句：
1、你在服用其他什么处方药或非处方药吗？
Are you taking any other medicines whether on prescription or bought over the counter?
2、如果症状较轻，试试用非处方药来治疗。
If you have only mild symptoms, try an over-the-counter treatment.
3、使用抑制COX-2酶的药物包括如非处方药镇痛剂布洛芬等的抗炎药。
Drugs that block COX-2 include anti-inflammatories, such as over-the-counter painkiller ibuprofen.
4、不像处方药，草药添加剂的安全性和有效性不受食品和药物管理局（FDA）监管。
Unlike prescription medications, herbal supplements are not regulated for safety and efficacy by the Food and Drug Administration ( FDA).
5、我爸去出差了而我的处方药。
So my dad's away on business and the prescription.
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