A revamped regulatory framework may give investors less of a “guessing game” as they weigh chances for drug approvals, one analyst said.

Attempting to bring new medicines to market is an inherently risky endeavor, with sponsors ultimately failing more than 90% of the time. But rare disease development is even harder; there are fewer patients available for research and less knowledge about both the condition and potential biomarkers that can serve as endpoints for a trial.

That has often left regulators in a quandary as they try to weigh the routine demand for clear evidence of safety and efficacy against the need for new treatments for devastating conditions. Peter Marks, the former head of the FDA’s drug evaluation center, was a champion for many of these rare disease drugs but also faced blowback from critics who suggested the agency had become too flexible.

One of those critics was Vinay Prasad, who took over the FDA’s biologics center in 2025. Under President Trump, Prasad and former FDA Commissioner Marty Makary talked about trying to help rare disease drug developers while taking a series of harder-line stances that confused and frustrated the industry as well as patient advocates.

Both Prasad and Makary are now gone , and the FDA is still waiting for a permanent leader . But the agency has since reversed several of the decisions that drew fire from the industry. The latest initiative continues this ongoing “reset” and may remove even more of the uncertainty that marked their tenure, Leerink Partners analyst Joseph Schwartz wrote in a note to clients.

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