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  • Title: Exenatide Once Weekly: Effectiveness, Tolerability, and Discontinuation Predictors in a Real-world Setting.
    Author: Di Dalmazi G, Coluzzi S, Baldassarre MPA, Sorbo SE, Dell'Aquila S, Febo F, Ginestra F, Graziano G, Rossi MC, Consoli A, Formoso G.
    Journal: Clin Ther; 2020 Sep; 42(9):1738-1749.e1. PubMed ID: 32753164.
    Abstract:
    PURPOSE: The goal of this study was to evaluate the effectiveness and safety of exenatide once weekly (EOW) and to determine predictors of treatment response and drug discontinuation in patients with type 2 diabetes mellitus (T2DM) followed up for 18 months in a real-world setting. METHODS: This retrospective cohort study included patients with T2DM who initiated EOW 2 mg between 2014 and 2019 in an outpatient diabetes clinic in Italy. Data were collected at baseline and at follow-up visits (6, 12, and 18 months after EOW). We estimated glycosylated hemoglobin (HbA1c) and body weight mean changes from baseline to follow-up visits and assessed the proportion of patients reaching HbA1c target ≤7% and a 5% weight loss after 12 months of treatment. We then attempted to establish predictors of glycemic and weight response, and compared patient characteristics between subjects who persisted on treatment versus those who discontinued EOW. FINDINGS: One-hundred eighty-six patients (46.2% male) were included in the study. The mean (SD) age and diabetes duration were 63.2 (8.9) years and 10.7 years (18.3), respectively. Significant reductions in HbA1c values (-0.9%; 95% CI, -1.1 to -0.8) and body weight (-2.8 kg; 95% CI, -3.4 to -2.2) were observed after 6 months. Sixty-one percent of patients (87 of 143) achieved target HbA1c values ≤ 7% after 12 months, and 34% (45 of 134) exhibited a weight loss of at least 5% of baseline body weight. Blood glucose and weight reductions were maintained after an 18-month follow-up. Predictors of adequate glycemic and weight response were shorter diabetes duration and nonuse of a different GLP-1RA, respectively. Patients on sulfonylureas failed to reach metabolic and body weight targets. The most common adverse events were gastrointestinal side effects (7.5%) and injection site reactions (6.4%), followed by headache (1.1%) and allergic reactions (1.1%). Forty-three percent of patients (79 of 186) discontinued EOW. The main reasons for discontinuation were insufficient HbA1c improvement and/or limited weight reduction (19.9%), side effects (16.1%), or patient decision (6.5%). Predictors of discontinuation were higher HbA1c levels at baseline and use of basal insulin therapy before EOW treatment. IMPLICATIONS: EOW treatment, in a real-world setting, offers sustained and effective glycemic control and weight loss over 18 months in patients with T2DM. Diabetes duration and basal insulin therapy, however, may affect the outcome of EOW treatment, suggesting that early initiation of EOW could improve glycemic control and reduce the risk of treatment discontinuation.
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