As best as I can tell, since the 1700s (and likely earlier), the medical profession has been defined by aggressively pushing toxic pharmaceuticals of dubious value onto the public and then denying any harm could have arisen from the drug. Frequently after the fact, the drug is widely accepted to be inappropriate to administer, but there is always an inability by the medical field to believe any of the drugs presently in use are like those of the not-too-distant past that are now widely recognized as quackery.
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