RALEIGH, N.C.--(BUSINESS WIRE)--Salix Pharmaceuticals, Ltd. (NASDAQ:SLXP), a specialty pharmaceutical company, today announced it has closed its previously announced public offering of 5,500,000 shares of its common stock at a price of $21.00 per share. On November 18, 2009, Jefferies & Company, Inc., acting as the sole book-running manager of the offering, exercised in full its over-allotment option to purchase an additional 825,000 shares of common stock. The exercise of the option increased the size of the offering to an aggregate of 6,325,000 shares of common stock.