This is interesting because Amazon isn't exactly known for supply chain integrity. Who here hasn't received fakes from Amazon? If you rely on a specific medication for your health, is Amazon a brand you trust to deliver it? How long until they start commingling pills and shipping random counterfeit/fake product to users? Hope it never happens but if they do with pharmaceuticals what they did with everything else they…
The integrity of the pharmaceutical supply chain is controlled by a specific federal law, Title II of the Drug Quality and Security Act of 2013, also known as the Drug Supply Chain Security Act. The potential liability they would be exposing themselves to if Amazon treated their drug supply chain the way they treat standard 'Fulfilled by Amazon' products would hopefully prevent something like that from ever happening…
Amazon isn't stupid: they know _exactly_ where they can play it fast and loose in order to maximize profit and where they must operate under strict regulation. This isn't the former.