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Effect of Initial Combination Therapy With Sitagliptin, a Dipeptidyl Peptidase-4 Inhibitor, and Metformin on Glycemic Control in Patients With Type 2 Diabetes

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Goldstein, Barry J., Feinglos, Mark N., Lunceford, Jared K., Johnson, Jeremy, Williams-Herman, Debora E., for the Sitagliptin 036 Study Group·2007·Diabetes Care

Abstract

OBJECTIVE—To assess the efficacy and safety of initial combination therapy with sitagliptin and metformin in patients with type 2 diabetes and inadequate glycemic control on diet and exercise. RESEARCH DESIGN AND METHODS—In a 24-week, randomized, double-blind, placebo-controlled, parallel-group study, 1,091 patients with type 2 diabetes and A1C 7.5–11% were randomized to one of six daily treatments: sitagliptin 100 mg/metformin 1,000 mg (S100/M1000 group), sitagliptin 100 mg/metformin 2,000 mg (S100/M2000 group), metformin 1,000 mg (M1000 group), metformin 2,000 mg (M2000 group) (all as divided doses administered twice daily [b.i.d.]), sitagliptin 100 mg q.d. (S100 group), or placebo. Patients who had an A1C >11% or a fasting glucose value >280 mg/dl after the run-in period were not eligible to be randomized; these patients could participate in an open-label substudy and were treated with S100/M2000 for 24 weeks. RESULTS—The mean baseline A1C was 8.8% in the randomized patients. The placebo-subtracted A1C change from baseline was −2.07% (S100/M2000), −1.57% (S100/M1000), −1.30% (M2000), −0.99% (M1000), and −0.83% (S100) (P < 0.001 for comparisons versus placebo and for coadministration versus respective monotherapies). The proportion of patients achieving an A1C <7% and <6.5% was 66 and 44%, respectively, in the S100/M2000 group (P < 0.001 vs. S100 or M2000). For the open-label cohort (n = 117; baseline A1C 11.2%) treated with S100/M2000, the within-group mean A1C change from baseline was −2.9%. The incidence of hypoglycemia was low (0.5–2.2%) across active treatment groups and not significantly different from that in the placebo group (0.6%). The incidence of gastrointestinal adverse experiences was similar for coadministration therapies compared with their respective metformin monotherapy. CONCLUSIONS—The initial combination of sitagliptin and metformin provided substantial and additive glycemic improvement and was generally well tolerated in patients with type 2 diabetes.

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Authors
Goldstein, B. J., Feinglos, M. N., Lunceford, J. K., Johnson, J., Williams-Herman, D. E., & for the Sitagliptin 036 Study Group
Affiliations
  • Thomas Jefferson University (US)
  • Duke University (US)
  • Merck & Co., Inc., Rahway, NJ, USA (United States) (US)
  • Clinical and Quantitative Sciences, Merck Research Laboratories, Rahway, New Jersey
Venue
Diabetes Care
Published
2007-08-01
Volume
30
Issue
8
Pages
1979-1987
ISSN
  • 0149-5992 (ISSN-L)
  • 1935-5548
OpenAlex
W2113901579
Cited by
509
References
31
Citations by year
2026: 6 · 2025: 7 · 2024: 7 · 2023: 8 · 2022: 10 · 2021: 13 · 2020: 14 · 2019: 8 · 2018: 17 · 2017: 22 · 2016: 21 · 2015: 27 · 2014: 29 · 2013: 52 · 2012: 40
FWCI
41.65
Type
journal article
Language
en
Open access
Locations
  • Diabetes Care (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
sitagliptin, metformin, combination therapy, type 2 diabetes, glycemic control, HbA1c, DPP-4 inhibitors, initial treatment, drug safety, adverse events, hypoglycemia, hyperglycemia, weight gain, antidiabetic drugs, open-label extension, fasting blood glucose
MeSH terms
Sitagliptin Phosphate, Adult, Aged, Blood Glucose, Diabetes Mellitus, Type 2, Dose-Response Relationship, Drug, Double-Blind Method, Drug Therapy, Combination, Glycated Hemoglobin, Humans, Hypoglycemic Agents, Metformin, Middle Aged, Placebos, Pyrazines, Triazoles, Single-Blind Method, Patient Selection

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