Imagine going to the pharmacy to fill your prescription only to learn later that the drug your doctor prescribed is not the one you received.

当你拿着处方到药店开药，而不久后发现，医生给你开的药和你手中拿到的药并不一样。

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Sprays and inhalers are available by prescription only, and it's important to see your doctor before buying the patch and gum over the counter.

吸气器和鼻喷剂只有通过开处方才能获得，而且在柜台上买戒烟贴片口香糖之前去问一下你的医生，是很重要的一件事。

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Systems for regulatory control must ensure that these drugs meet acceptable quality standards, are sold on prescription only, and are prescribed only by accredited practitioners.

监管控制系统必须确保这些药物达到可接受的质量标准，仅凭处方出售，并且只能由获得资格认证的从业人员开具处方。

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Prescription drugs represent only about one-tenth of all health care spending in the United States.

VOA: special.2009.09.11

His analysis indicates that patients get a new Glucophage prescription only every 152 days.

FORBES: Magazine Article

However, the Medicines Act has it as a prescription only drug, which means its unauthorised supply is illegal.

BBC: Drugs: It's a class issue

To make it available by prescription only would deprive consumers of a painkiller that is no more dangerous than others.

FORBES: At Last A Judge Who Understands Warnings Overload