Google should really stick to removing ads for drugs (and sites that sell them) that are regulated by the DEA. According to their rules, any pharmacy without a SquareTrade ID will be cut-off even if they only sell over the counter products! That is totally unfair.
They should use the list available at DEA.gov and remove ads for ANY site that peddles controlled substances (which need special ordering procedures anyway -- try entering "phentermine" on drugstore.com). By definition these controlled substances have a moderate to high risk of addiction and dependence and needs to be regulated accordingly.
Unfortunately they are going to remove all pharmacies. (Don't think a SquareTrade ID is easy to get -- it's a difficult, time-consuming, expensive process with a company that is known to provide bad service.)
So the question to ask is why is this really being done? To remove opiates and controlled substances such as diet pills and steroids from the list? Or is it to remove competition (including pharmacies that do not sell any controlled substances) on behalf of a tiny list of pharmacies collaborating in this effort?