Sitagliptin Shows Efficacy Up to 2 Years in Type 2 Diabetes Either Alone or as Add-On Therapy: Reported at EASD
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Sitagliptin Shows Efficacy Up to 2 Years in Type 2 Diabetes Either Alone or as Add-On Therapy: Reported at EASD

By Bruce Sylvester

VIENNA, Austria -- October 3, 2009 -- Patients with type 2 diabetes treated with sitagliptin, either alone or as add-on therapy to metformin, achieve substantial improvement in glycaemic control out to 2 years.

“When you look at sitagliptin data from patients over 2 years, either as monotherapy or add-on to metformin, you see glycaemic benefit in both groups out to 2 years,” said presenter and investigator Debora Williams-Herman, MD, Merck Laboratories, Rahway, New Jersey.

“This adds to our developing understanding of this durability of this treatment,” she said on October 1 here at the 45th Annual Meeting of the European Association for the Study of Diabetes (EASD).

For analysis of sitagliptin monotherapy, researchers pooled data from 2 clinical trials evaluating glycosylated haemoglobin (Hb A1C) response over time in 147 patients with a common baseline Hb A1C. At the time of screening, patients were not using any drugs for glycaemic control.

To analyse the effect of sitagliptin as add-on therapy to metformin, researchers pooled data from 2 other clinical trials totalling 852 patients with a common baseline Hb A1C.

Missing data were not included in the analysis. This included patients who used rescue therapy (46% of those receiving monotherapy and 33% of those receiving combination therapy) and for patients who discontinued treatment due to lack of efficacy.

Sitagliptin monotherapy decreased mean Hb A1C from 8.5% at baseline to 6.9% in 32 patients who completed 2 years of treatment.

Adding sitagliptin to metformin decreased mean Hb A1C from 8.0% at baseline to 6.9% at 2 years in 347 patients.

Sitagliptin was generally well tolerated over 2 years in each of the 4 trials from which data were drawn.

Funding for this study was provided by Merck.

[Presentation title: Long-Term Efficacy With Sitagliptin as Monotherapy or Add-On Therapy to Metformin: Improvement in Glycaemic Control Over 2 Years in Patients With Type 2 Diabetes. Abstract 754]

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