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Yes I've heard placebo's work better if they have an official license
That may even be true, but even it is isn't, licensing placebos would be a handy bypass to the reluctance of some GPs to prescribe off-label. Prescribing antibiotics for viral infections is dangerous on a population level, we need a way for doctors to get rid of idiot patients quickly in a way which doesn't threaten the rest of us.
Yes I've heard placebo's work better if they have an official license, GP has to remember to tell the patient though...