From 2010 to 2011, the U.S. OTC drug market posted a gain of 2.4% from $20.9 billion in 2010 to $21.4 billion in 2011 at the manufacturers’ level. The fastest growing categories include allergy relief products, which grew 16.3% in 2011 aided by the market launch of Rx-to-OTC switch brand Allegra (Sanofi-Aventis) and the strong