The report looks at US law and Microsoft policies for rogue pharmacy advertising and starts with the observation that
Microsoft states that it uses an Internet pharmacy verification service to ensure that its prescription drug advertisements are legitimate. However, most Internet pharmacies (89.7%) advertising on bing.com were found to be fraudulent or illegal.
The highlights of the report are:
Of the prescription drug and online pharmacy advertisements sponsored by Microsoft that we reviewed, 89.7% led to “rogue” Internet pharmacies that do not require a prescription for prescription drugs, or are otherwise acting unlawfully or fraudulently.
Despite Microsoft’s stated policy of only sponsoring Internet pharmacies that supply drugs from the United States or Canada, beginning by clicking on one of Microsoft’s advertisers, the authors received prescription drugs, without a prescription, from India. The drugs tested counterfeit.
Most of the prescription drug advertisements sponsored by Microsoft that were reviewed for this report did not require a prescription for the sale of prescription drugs, including addictive medicines and controlled substances.
Some ads were displayed for a legitimate US-based Internet pharmacy, but directed Internet users to a completely different, illegal Internet pharmacy website.
Some rogue Internet pharmacies sponsored by Microsoft are members of “affiliate pharmacy networks” linked to Russian organized crime that operate thousands of fake Internet pharmacies.
Also it's intereting to read Section V: "Search Engines’ Responsibility and Liability" op p.12 and 13.