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Efficacy and tolerability of exenatide once weekly versus sitagliptin in patients with type 2 diabetes mellitus: a retrospective analysis of pooled clinical trial data.

Author(s): Malloy J(1), Meloni A, Han J.

Affiliation(s): Author information: (1)Amylin Pharmaceuticals, LLC, San Diego, CA 92121, USA. jaret.malloy@amylin.com

Publication date & source: 2013, Postgrad Med. , 125(3):58-67

AIM: Therapies for type 2 diabetes mellitus that leverage the glucagon-like peptide-1 (GLP-1) receptor signaling pathway have been shown to reduce rates of hyperglycemia and have beneficial effects on body weight. This post hoc analysis compared the effects of 2 GLP-1 receptor- based therapies, exenatide once weekly (EQW), a GLP-1 receptor agonist, and sitagliptin (sita), a dipeptidyl peptidase-4 inhibitor, on glucose control across the range of baseline glycated hemoglobin (HbA1c) levels specified in the American Association of Clinical Endocrinologists and American College of Endocrinology treatment algorithm. MATERIALS AND METHODS: Data from patients treated with either EQW or sita for 26 weeks in 2 randomized, double-blind, comparator-controlled clinical trials were pooled and analyzed. Glycemic endpoints and cardiovascular risk factors were evaluated in subgroups and the overall population. RESULTS: Analysis included 737 patients on background therapies of diet and exercise and/or metformin. While both agents reduced HbA1c and fasting blood glucose (FBG) levels from baseline, significantly greater reductions in HbA1c and FBG levels occurred with EQW compared with sita across all baseline HbA1c level strata, and significantly more patients in the EQW group achieved goal HbA1c levels compared with the sita group. Patients treated with EQW also experienced significantly greater reductions in body weight and cholesterol levels compared with patients treated with sita. The incidences of the most common adverse events of nausea and diarrhea were higher in the EQW group compared with the sita group, and incidences of these adverse events decreased over time. Both groups experienced a low incidence of minor hypoglycemic events. CONCLUSION: Significantly greater improvements in HbA1c and FBG levels were observed in EQW- compared with sita-treated patients across all baseline HbA1c level strata. Additionally, greater reductions in body weight and some cardiovascular risk factors were observed with EQW treatment compared with sita treatment. Both EQW and sita were generally well tolerated; sita-treated patients experienced fewer adverse events than EQW-treated patients. TRIAL REGISTRATION: www.ClinicalTrials.gov identifiers: NCT00637273, NCT00676338.

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