Diabetes careApr 19, 2014

Effectiveness and safety of dulaglutide compared to sitagliptin after one year in type 2 diabetes

GLP-1 Therapies Weekly Brief ↗PubMed ↗DOI ↗

Updated Apr 5, 2026

Abstract

At 52 weeks, dulaglutide 1.5 mg resulted in a 1.10% reduction in glycosylated hemoglobin A1c (HbA1c).

Dulaglutide 1.5 mg and 0.75 mg both achieved greater reductions in HbA1c compared to sitagliptin, with mean changes of -1.10% and -0.87%, respectively.
Sitagliptin showed a smaller reduction in HbA1c at -0.39%.
Both dulaglutide doses were statistically superior to sitagliptin (P < 0.001).
No severe hypoglycemia incidents were reported during the study.
Dulaglutide 1.5 mg and 0.75 mg were associated with greater weight loss compared to sitagliptin, with changes of -3.03 kg and -2.60 kg, respectively.
The most frequently reported gastrointestinal side effects for dulaglutide were nausea, diarrhea, and vomiting.

Simplified

OBJECTIVE: To compare the efficacy and safety of two doses of once-weekly dulaglutide, a glucagon-like peptide 1 receptor agonist, to sitagliptin in uncontrolled, metformin-treated patients with type 2 diabetes. The primary objective was to compare (for noninferiority and then superiority) dulaglutide 1.5 mg versus sitagliptin in change from baseline in glycosylated hemoglobin A1c (HbA1c) at 52 weeks.

RESEARCH DESIGN AND METHODS: This multicenter, adaptive, double-blind, parallel-arm study randomized patients (N = 1,098; mean baseline age 54 years; HbA1c 8.1% [65 mmol/mol]; weight 86.4 kg; diabetes duration 7 years) to dulaglutide 1.5 mg, dulaglutide 0.75 mg, sitagliptin 100 mg, or placebo (placebo-controlled period up to 26 weeks). The treatment period lasted 104 weeks, with 52-week primary end point data presented.

RESULTS: The mean HbA1c changes to 52 weeks were (least squares mean ± SE): -1.10 ± 0.06% (-12.0 ± 0.7 mmol/mol), -0.87 ± 0.06% (9.5 ± 0.7 mmol/mol), and -0.39 ± 0.06% (4.3 ± 0.7 mmol/mol) for dulaglutide 1.5 mg, dulaglutide 0.75 mg, and sitagliptin, respectively. Both dulaglutide doses were superior to sitagliptin (P < 0.001, both comparisons). No events of severe hypoglycemia were reported. Mean weight changes to 52 weeks were greater with dulaglutide 1.5 mg (-3.03 ± 0.22 kg) and dulaglutide 0.75 mg (-2.60 ± 0.23 kg) compared with sitagliptin (-1.53 ± 0.22 kg) (P < 0.001, both comparisons). The most common gastrointestinal treatment-emergent adverse events in dulaglutide 1.5- and 0.75-mg arms were nausea, diarrhea, and vomiting.

CONCLUSIONS: Both dulaglutide doses demonstrated superior glycemic control versus sitagliptin at 52 weeks with an acceptable tolerability and safety profile.

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Effectiveness and safety of dulaglutide compared to sitagliptin after one year in type 2 diabetes

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