A 58-year-old patient with type 2 diabetes has an HbA1c of 8.9%. Current treatment is metformin 1000 mg twice daily. Which is the most appropriate next step?
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A
Add a GLP-1 receptor agonist
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B
Switch to insulin glargine monotherapy
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C
Reduce metformin dose and recheck in 6 months
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D
Refer to endocrinology before any change