Originally posted by billyjoe
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"Overall, the FDA was efficient in their review of new drug applications (NDAs) and biologics license applications (BLAs), generally hitting their PDUFA timelines. Nineteen drugs were approved in the first round of review. There was an unusually high percentage of approvals in 2011 (>80%) compared with recent years (typically ~50%). Analysts expect fewer approvals in 2012."
If that's what you were asking...(?).
Or were you asking the percentage of successful Phase 1, 2a, 2b that go on to a successful Phase 3? Hard to know that because they test for different things (eg., to establish the effective tolerated dosage) on small numbers of people before they get to large numbers of people in phase 3. There is a chart here that explains it pretty well: http://en.wikipedia.org/wiki/Phases_...nical_research
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