Purplecape is right. And drugs.com is a massive ecom site.
> they don't have to play by the same rules.
They aren't traditional AdSense players. If you look at their site, you will find other DoubleClick ads as well. That implies that they are part of Googles Tier 1 partners. That is a different "program" that AdSense. Some of them are probably CPA and/or affiliate ads.