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# Did a Flu Drug Manufacturer Withhold Evidence From Drug Trials?
- URL: https://www.foodconsumer.org/drug_trials_101220090601/
- Published: 2009-12-10T18:00:00.000Z
- Updated: 2026-09-22T18:45:56.000Z
- Description: Doctors say Roche has withheld Tamiflu trial data, leaving scientists unable to judge the stockpiled drug. A review of what is publicly available found no evidence it prevents complications such as pneumonia in otherwise healthy people; it may shorten illness by about a day.
- Author: Food Consumer
- Tags: Miscellaneous, Health News, #vivvo-import

Posted by: [Dr. Mercola](http://articles.mercola.com/members/Dr.-Mercola/default.aspx?ref=foodconsumer.org)  
December 10 2009  

Doctors have alleged that Roche, the manufacturer of Tamiflu, has made it impossible for scientists to assess how well the anti-flu drug stockpiled around the globe works by withholding the evidence the company has gained from trials.

A major review of what data there is in the public domain has found no evidence Tamiflu can prevent healthy people with flu from suffering complications such as pneumonia.

Tamiflu may shorten the bout of illness by a day or so, the investigators say, but it is impossible to know whether it prevents severe disease, because the published data is insufficient. Roche has failed to make some of the studies carried out on the drug publicly available.

  
Sources:

![](https://storage.ghost.io/c/f5/c2/f5c28c07-f2c7-440d-8161-125a09d9bc91/content/images/2026/08/ad07fcc2c1b88ea962a7acfb617d9fce0d5472f0.gif)

[The Guardian December 8, 2009](http://www.guardian.co.uk/world/2009/dec/08/tamiflu-swine-flu-roche?ref=foodconsumer.org)