Google announced they are now allowing certain pharmacy and drug ads on their search results. Google AdWords will only accept advertisements from VIPPS and CIPA certified pharmacies, and that these pharmacies can only target ads within the countries where they are accredited.
Of course, for those running ads on the topic of pharmacy and drugs and health, that may have been running ads in the realm of those topics - may also be hit by some algorithm that blocks these ads.
A WebmasterWorld thread has at least one complaint from an advertiser:
Once again, Google used an automated process to "clean house" it appears.
I had no idea that I ran an "Online Pharmacy"
To be honest, I always thought that Google disallowed all pharma ads - I guess I was wrong?
Forum discussion at WebmasterWorld.