A member asked:

How long does it take for a cancer drug to get through phase iii open label trials, usually?

A doctor has provided 1 answer

Years: That is billion dollar question and also equally that expensive to release the drug . Safety and effectiveness is tested in phase iii for fda approval to go for phase IV to public rx may take may take long time, some times years and some times never drug disappears . Public safety is essential, look what happened to thalidamide , a tragedy.

Answered 6/10/2014

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