Manufacturer: Daiichi SankyoPrescribed for: Blood pressureU.S. patent expiry in: October 2016Approved by the FDA in 2002, Benicar belongs to the class of “angiotensin receptor blockers”. With annual global sales of $1.8 billion, it is one of the top-selling biotech drugs. Benicar sports a black-box warning regarding the risk of birth defects in women who are pregnant while taking the medication.Mylan, Sandoz, Teva and Torrent are some of the generic manufacturers that have sought approval from the FDA to market generic Benicar.