# of U.S. Prescriptions - 2009
[IMS Health]
Total Prescriptions                3.9 billion

   lipid     #1       210.5 million
   codeine     #2       200.2 million
    ADs     #3       168.7 million
   ACEi     #4       162.8 million
   AEDs     #7         104.5 million
   benzos     #11               87.9 million
   arthritis     #13              77.9 million