WEDNESDAY, March 22 (HealthDay News) -- OsmoPrep tablets (sodium phosphate monobasic monohydrate and sodium phosphate dibasic anhydrous) have been approved by the U.S. Food and Drug Administration to cleanse the bowel before a colonoscopy, a test to detect colon cancer. The tablet's maker, Salix Pharmaceuticals, said OsmoPrep had been approved for people 18 and older as an alternative to high-volume liquids taken before the procedure. In a statement, the company cited a Mayo Clinic study's conclusion that unwillingness to take a bowel preparation was "the single largest barrier to colorectal cancer screening." Still, more than 10 million uses of bowel...