Effects of Metformin Hydrochloride (HCl) in Combination With Colesevelam HCl, Compared to Metformin HCl Alone, in Patients With Type 2 Diabetes Mellitus and the Effects of Colesevelam HCl on Lipids and Glucose on Pre-diabetic Patients.

One or two Metformin HCl tablets 850 mg (depending on tolerability) and 6 colesevelam 625 mg placebo tablets once daily for 16 weeks

One or two Metformin HCl tablets 850 mg (depending on tolerability) and 6 colesevelam 625 mg tablets once daily for 16 weeks

Six colesevelam 625 mg placebo tablets will be given once a day for 16 weeks

Six colesevelam 625 mg tablets will be given once a day for 16 weeks.