这种药是处方药，没有医生的处方买不到。

This medicine is a ___prescription-drug, so you can't buy it without a doctor's note.

医生开了处方药来治疗他的慢性疼痛。

The doctor prescribed a ___prescription-drug for his chronic pain.

医生给我开了一些处方药来治疗头痛。

The doctor gave me some ___prescription drugs for my headache.