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Clinical Approach to Medical Management of Type 2 Diabetes

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The Biguanides:<br />

Basic Characteristics <strong>of</strong> Metformin<br />

Mechanism: Decreases hepatic glucose production<br />

by activating AMP-kinase<br />

Power: Decreases HbA 1c ~ 1.5%<br />

Dosing:<br />

One <strong>to</strong> three times daily<br />

(aim for 2000 mg daily)<br />

Side effects: Diarrhea, nausea (start low), low B12<br />

Main risk: Lactic acidosis, very rare (1/3000<br />

patient-years)<br />

Limitations: Cr < 1.5 (M), < 1.4 (F),<br />

(Canada Cr cl > 60)

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