Benzinga's Top #PreMarket Losers

Horizon Pharma

fell 32.37% to $9.40 in pre-market trading after the company reported that CVS Caremark

and Express Scripts

expect to announce DUEXIS and VIMOVO will no longer be on formularies and will be placed on exclusion lists effective january 1, 2015. AcelRx Pharmaceuticals

shares declined 28.72% to $7.72 in pre-market trading after the company received Complete Response Letter from the FDA for New Drug Application for Zalviso. Hanwha SolarOne Co

dipped 4.48% to $2.13 in pre-market trading after falling 0.45% on Friday. Sohu.com

dropped 4.21% to $55.00 in pre-market trading after the company posted a loss in the second quarter. The company posted a quarterly loss of $45 million, or $1.16 per share, versus a loss of $69 million in the earlier quarter. Non-GAAP net loss came in at US$0.88 loss per share.