Pharmaceutical contamination in our drinking water has become more and more prevalent fortunately, there is one manufacturer out there that can make any certified claims that they remove/reduce pharmaceuticals from drinking water (see NSF 401 Specifications). 

However, the Water Quality Association has come out with a statement that POU (Point of Use) activated carbon water filtration treatment offers the "best protection" for drinking water and that having activated carbon (the primary component in our counter top and under sink water filters) has "shown promise in removing many of these contaminants." NSF has developed standards for testing, but the EPA has not developed allowable limits (MCLs) for any pharmaceutical drugs.

The carbon block units with the most extensive certifications are the CB Tech CBVOCSB, CBASSB and the Bestfilters Countertop and Under Sink Models

Further Reading: NSF statement about pharmaceuticals in drinking water: "Home filtering systems provide best protection for drinking water."