title: Comparison of vildagliptin and sitagliptin in patients with type 2 diabetes and severe renal impairment: a randomised clinical trial.
abstract: OBJECTIVE
  There are limited data comparing dipeptidyl peptidase-4 (DPP-4) inhibitors directly. We compared the safety and efficacy of vildagliptin and sitagliptin in patients with type 2 diabetes and severe renal impairment (RI).
  
  
  METHODS
  This study was a parallel-arm, randomised, multicentre, double-blind, 24 week study conducted in 87 centres across Brazil and the USA. Patients with type 2 diabetes, either drug naive or treated with any glucose-lowering agents, who had inadequate glycaemic control (HbA1c 6.5-10.0% [48-86 mmol/mol]) and an estimated GFR <30 ml min(-1) [1.73 m](-2) were randomised (via interactive voice response technology) to vildagliptin 50 mg once daily or sitagliptin 25 mg once daily. These doses are recommended in this patient population and considered maximally effective. Participants, investigators and the sponsor were blinded to group assignment. Efficacy endpoints included change in HbA1c and fasting plasma glucose (FPG) at all visits and the primary safety endpoint was assessment of treatment-emergent adverse events.
  
  
  RESULTS
  In total, 148 patients were randomised, 83 to vildagliptin and 65 to sitagliptin. All patients were analysed. After 24 weeks, the adjusted mean change in HbA1c was -0.54% (5.9 mmol/mol) from a baseline of 7.52% (59 mmol/mol) with vildagliptin and -0.56% (6.1 mmol/mol) from a baseline of 7.80% (62 mmol/mol) with sitagliptin (p = 0.874). FPG decreased by 0.47 ± 0.37 mmol/l with vildagliptin and increased by 0.16 ± 0.43 mmol/l with sitagliptin (p = 0.185). Both treatments were well tolerated with overall similar safety profiles.
  
  
  CONCLUSIONS
  At their recommended doses for severe RI, vildagliptin (50 mg once daily) compared with sitagliptin (25 mg once daily) demonstrated similar efficacy and both drugs were well tolerated. This study provides further support for the use of DPP-4 inhibitors in patients with severe RI.
  
  
  BACKGROUND
  ClinicalTrials.gov NCT00616811 (completed)
  
  
  BACKGROUND
  This study was planned and conducted by Novartis.
authors.affiliation: Novartis Pharma AG, Postfach, CH-4002, Basel, Switzerland, wolfgang.kothny@novartis.com.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Kothny
authors.forename: Valentina
authors.initials: V
authors.lastname: Lukashevich
authors.forename: James E
authors.initials: JE
authors.lastname: Foley
authors.forename: Marc S
authors.initials: MS
authors.lastname: Rendell
authors.forename: Anja
authors.initials: A
authors.lastname: Schweizer
mesh_terms: D000218:Adamantane / Q000008:administration & dosage / Q000031:analogs & derivatives*; D000368:Aged; D001786:Blood Glucose / Q000032:analysis; D001938:Brazil; D003924:Diabetes Mellitus, Type 2 / Q000097:blood* / Q000150:complications / Q000188:drug therapy*; D004311:Double-Blind Method; D005260:Female; D006442:Glycated Hemoglobin / Q000032:analysis; D006801:Humans; D007004:Hypoglycemic Agents / Q000008:administration & dosage*; D007674:Kidney Diseases / Q000097:blood* / Q000150:complications / Q000188:drug therapy*; D008297:Male; D008875:Middle Aged; D009570:Nitriles / Q000008:administration & dosage*; D011759:Pyrrolidines / Q000008:administration & dosage*; D000068900:Sitagliptin Phosphate / Q000008:administration & dosage*; D014481:United States; D000077597:Vildagliptin
chemical_list: D000218:Adamantane; D001786:Blood Glucose; D006442:Glycated Hemoglobin; D007004:Hypoglycemic Agents; D009570:Nitriles; D011759:Pyrrolidines; D000068900:Sitagliptin Phosphate; D000077597:Vildagliptin; C517652:hemoglobin A1c protein, human