Saturday, August 19, 2006

Clinical Trials: Phase 1, 2 , 3 and 4 ---(4)


Phase 4 trials are done after a drug has been shown to work and has been granted a license. So they are looking at drugs that are already available for doctors to prescribe, rather than new drugs that are still being developed.

The main reasons pharmaceutical companies run phase 4 trials are to find out

* More about the side effects and safety of the drug
* What the long term risks and benefits are
* How well the drug works when it’s used more widely than in clinical trials

There is more information about the different phases of clinical trials on the website of The Association of the British Pharmaceutical Industry (ABPI).

Source: Cancer Research UK

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