NEW YORK ( TheStreet) -- Shares of Zogenix (Nasdaq: ZGNX) were gapping down Friday morning with an open price 15.7% lower than Thursday's closing price. The stock closed at $2.49 Thursday and opened today's trading at $2.10. The average volume for Zogenix has been 406,400 shares per day over the past 30 days. Zogenix has a market cap of $161.7 million and is part of the health care sector and drugs industry. Shares are up 12.2% year to date as of the close of trading on Thursday. Zogenix, Inc., a pharmaceutical company, engages in the development and commercialization of products for the treatment of central nervous system disorders and pain. The company has a P/E ratio of 0.1, below the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Zogenix as a sell. Among the areas we feel are negative, one of the most important has been poor debt management on most measures. You can view the full Zogenix Ratings Report. Get more investment ideas from our investment research center. Interested in other stocks that are gapping down? Get free SMS text alerts sent to you when the action happens by texting DOWN to 95370 or select from multiple alert options.