Douglas_Knight comments on Coffee: When it helps, when it hurts - Less Wrong
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None of the drugs mentioned in this thread are still under patent. The only relevant current patent is on "minus pseudoephedrine," but that never reached market. Also, I think you're confusing (ephedrine, pseudoephedrine) with (pseudoephedrine, phenylephrine). (ETA: and phenylephrine isn't under patent, either)