Rapamycin, the other big candidate, has one clear advantageover resveratrol: it's already FDA approved as a drug — but as animmunosuppressant.

雷帕霉素，另外一种抗衰老的重要健将，与白藜芦醇相比有一个非常明确的优点：雷帕霉素已经被美国食品药品管理局认可，但是是作为一种免疫抑制剂认可的。

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The FDA staff also notes that patients who received prasugrel were more likely to develop cancer than those who took Plavix, though it's not clear whether prasugrel actually raises the risk of cancer.

同时FDA文件提到接受普拉格雷治疗的患者相对接受氯比格雷治疗的患者更容易患上癌症，虽然目前不清楚是否由于使用了普拉格雷而导致癌症的产生。

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"Having worked on this for many years, the judge really wanted to make it clear that FDA had come to a scientific determination and was once again overruled, and that is not acceptable, " she added.

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It is clear if the FDA is asking manufacturers to do new studies on these drugs, it does not 100% trust its effectiveness and safety.

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The FDA could clear Iressa any day.

FORBES: Cover Story