... 34 ALLEGRA 18,772,070 35 PLAVIX 18,721,885 36 EFFEXOR XR 18,574,507 37 POTASSIUM CHLORIDE 18,523,548 38 PROTONIX 18,359,740 39 PROPOXYPHENE NAP W/APAP 17,931,369 40 ADVAIR DISKUS 17,400,826 41 WARFARIN SODIUM 16,581,657 42 ACETAMINOPHEN...
http://en.wikipedia.org/wiki/300_top_drugs