For example, a cancer drug might be approved because it causes tumors to shrink, not because its manufacturer can prove that patients live longer after taking it.

举例而言，一个癌症药因为能使肿瘤变小就可能被批准使用，而不是因为制造商能证明病人服用之后活得更长。

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While patients taking vemurafenib do very well, Schuchter said the drug stops working after about nine or 10 months.

病患服用vemurafenib后效果良好，舒特说服药9-10个月药物才失效。

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After 10 weeks of drug therapy, mice taking rifapentine and moxifloxacin tested negative for active TB and remained so when retested three months later.

药物治疗10周后，服用利福喷丁和莫西沙星的小鼠对肺结核显示阴性结果，三个月之后显示同样的结果。

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Researchers studied more than one hundred fifty patients whose condition had failed to improve after taking at least one drug.

VOA: special.2010.03.02

However, he warned that the results should be interpreted cautiously as not only were the study groups small, but there was possibly an increased risk of the patient being the source of further infections after taking the drug.

BBC: Success in malaria drug tests

"Women switching to exemestane had fewer cases of cancer in the other breast, which also suggests that taking the drug after tamoxifen may be a better way to prevent breast cancer than taking tamoxifen alone, " said Professor Charles Coombes of Imperial College London, the study's lead author.

BBC: Drug 'boosts breast cancer fight'

In 2005, the company pulled its multiple sclerosis drug, Tysabri, from the market after a patient who was taking the drug in conjunction with another medication died of a rare brain disorder.

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