Almost half of all new drug approvals in 2018 relied on one clinical trial
Back in the 1970s and 1980s, the FDA made clear that at least two adequate and well-controlled studies were necessary to establish a new drug’s effectiveness, except in only the rarest of circumstances.
Then in 1997, the Food and Drug Administration Modernization Act was passed, and Congress clarified that the FDA may consider “data from one adequate and well-controlled clinical investigation and confirmatory evidence” to approve a new drug.
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