NEW YORK ( TheStreet) -- Shares of Santarus (Nasdaq: SNTS) were gapping up Monday morning with an open price 11.3% higher than Friday's closing price. The stock closed at $4.50 Friday and opened today's trading at $5.01. The average volume for Santarus has been 332,500 shares per day over the past 30 days. Santarus has a market cap of $275.1 million and is part of the health care sector and drugs industry. Shares are up 36% year to date as of the close of trading on Friday. Santarus, Inc., a specialty biopharmaceutical company, engages in acquiring, developing, and commercializing proprietary products that address the needs of patients treated by physician specialists. The company has a P/E ratio of 450, below the average drugs industry P/E ratio of 452 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Santarus as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth, largely solid financial position with reasonable debt levels by most measures and increase in net income. However, as a counter to these strengths, we find that the company's return on equity has been disappointing. You can view the full Santarus Ratings Report. Get more investment ideas from our investment research center. Interested in other stocks that are gapping up? Get free SMS text alerts sent to you when the action happens by texting UP to 95370 or select from multiple alert options.