Watson Pharmaceuticals Inc will market an authorized generic of its anti-inflammatory drug, Colazal of  Salix Pharmaceuticals Ltd

Watson will immediately launch the generic drug for the treatment of mildly to moderately active ulcerative colitis. Salix Pharmaceuticals, Ltd., headquartered in Raleigh, North Carolina, develops and markets prescription pharmaceutical products for the treatment of gastrointestinal diseases. Salix's strategy is to in–license late–stage or marketed proprietary therapeutic drugs, complete any required development and regulatory submission of these products, and market them through the Company's 150–member gastroenterology specialty sales and marketing team.

COLAZAL® (balsalazide disodium) is an anti-inflammatory drug approved for the treatment of mildly to moderately active ulcerative colitis. Safety and effectiveness of COLAZAL beyond 12 weeks has not been established. COLAZAL was well tolerated in clinical studies. In clinical trials, patients reported the following adverse reactions most frequently: headache (8%); abdominal pain (6%); diarrhea (5%); nausea (5%); vomiting (4%); respiratory infection (4%); and arthralgia (4%). Withdrawal from therapy due to adverse reactions was comparable to placebo