Summary
The FDA has proposed removing oral phenylephrine, a common ingredient in over-the-counter cold medicines like NyQuil and Sudafed, due to evidence that it is ineffective as a nasal decongestant.
The proposal follows a unanimous vote by FDA advisers last year, and recent studies showing less than 1% of the drug is absorbed into the bloodstream when taken orally.
The public comment period ends on May 7, after which the FDA may finalize the ban.
I think it was this https://en.m.wikipedia.org/wiki/Fenfluramine/phentermine