Study drugs have been done a series of pharmacology, toxicity and animal testing before clinical trials.

试验用药在开始用于人的临床试验之前会进行一系列的药理学、毒性以及动物试验。

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This presentation belies one of the stated goals of NAVIGATOR — specifically, to study the combined effects of the two study drugs.

这一说法掩盖了一个既定的研究目标， 具体而言是研究两种药物的综合作用。

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Once patients left the study, there was no way for researchers to control what drugs they took, and those medicines may have neutralized the beneficial effects of the study drugs.

一旦患者左研究中，却没有办法，为科研人员控制哪些药物了，这些药物可能有瓦解的有利影响，研究药物。

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In two thousand eight, the Journal of the American Medical Association published a study of unplanned deaths from prescription drugs.

VOA: special.2011.07.19

But a recent study shows that another treatment may have better results for patients who were not helped by drugs.

VOA: special.2010.03.02

The findings made it possible to better study pain drugs and learn how they affect the body.

VOA: special.2009.02.10

This analysis, however, only included the time while patients were actually taking the study drugs.

FORBES: JNJ's Solid Win

This can motivate companies to study drugs against untreatable diseases first, in the hopes that once a medicine is approved, doctors will start prescribing it for other indications, increasing sales.

FORBES: InterMune Gets Around The FDA

"Afinitor is another example of the value of continuing to study drugs in additional types of cancer after their initial approval, " said Dr. Richard Pazdur, director of the FDA's cancer drug office.

MSN: FDA approves Afinitor for some breast cancers