Amazon has been in the pharmacy business for several years.
You do NOT get prime with the pharmacy.
...and it SUCKS.
All sorts of red tape to wade through.
They will NOT communicate directly with your doctor, forcing you to be the "monkey in the middle" between two parties that understand the same terms, where you do not.
They will NOT over fill on quantity- IE I need 24 insulin pens per 90 days, and they will not send five packs of five.
Instead they downgrade to 84 days and send 4 packs.
This kills almost all of the 20% discount for using 90 day mail order.
No other pharmacy I've ever dealt with has been that granular.
Also, their inventory control and out of stock procedure is terrible.
The past 5 months, they've let me order life saving insulin, then on the date it is supposed to be delivered they "delay" the delivery.
...and after 10 days, they cancel the order, then immediately send a reminder to refill.
If I had followed their procedure, I would have run out three times.
This is the kind of BS that causes people to tell anyone that will listen about bad service.