Overview The Role of P-glycoprotein in Sitagliptin Clinical Pharmacology Status: Completed Trial end date: 2011-07-01 Target enrollment: Participant gender: Summary The purpose of this study is to determine the pharmacogenetics, pharmacokinetics, and drug-drug interactions of sitagliptin therapy. Phase: Phase 4 Details Lead Sponsor: University of Colorado, DenverCollaborator: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)Treatments: AtorvastatinAtorvastatin CalciumKrestinSitagliptin Phosphate