I expect pharmacies to double check everything they buy, and I somehow doubt Amazon will be able to ensure safety when the package is handled by 10 different people. If they develop some kind of (digital?) package seal, I might change my mind. Or every pill container has an RFID chip and is verifiable with the supplier‘s public certificate.
They bought World Foods. They didn't start storing week old bread on their shelves.
The pharmacy division would be a completely separate process subject to all the additional _legal_ requirements all the other pharmacies adhere to. They're not going to just have buckets of Percocet lying around on shelves for anyone to access.
Especially for something where the businesses have set the regulator up as a gatekeeper.
I have a lot of problems with the pharma industry, but I'm not going to chance it with counterfeit medication just because I might save a few bucks. When I get something that's a counterfeit electronic off of Amazon - no harm, no foul, for the most part. Their customer support just refunds me the money and I can send it back. Can't really do the same with medication that might kill me.
I am not worried about fakes from less famous brands, but I would not buy any Nike products from Amazon; I get them at local retailers, Nike's online store, or Niketown if I am visiting a big city.
https://www.pbs.org/newshour/science/amazon-recalls-potentia...
[1] http://www.scmp.com/news/china/article/1283818/woman-electro...
Drugs differing by a couple thousands of a gram (mg) can severely harm or kill someone. There are some drugs measured in micrograms. And that speaks nothing of potential contaminates and cross-contamination. There's also no serious black market for theft and addictive abuse of electronics. (Not one that compares in the order-of-magnitude to the amount of drugs abused every day.)
You can say electronics should be more regulated. You can't argue (without much more talking points) that electronics are as deadly or dangerous as drugs... things you put inside your body.
And if you bring up medical electronics... we're right back to the same strict regulation that drugs have. So we don't even necessarily need more regulation of them.
Not all deliveries come from the warehouse; think of liaise scenarios with dispensaries eg https://www.amazon.com/restaurants
Also having a special section for pharma products staffed with licensed chemists and thoroughly vetted delivery staff shouldn't be beyond amazon.
There are other vectors of implementation I dont think authentication would be a problem