Metformin Use in Practice: Compliance With Guidelines for Patients With Diabetes and Preserved Renal Function

Area of Science:

• Endocrinology and Metabolism
• Pharmacology and Therapeutics

Background:

• Metformin is a first-line antidiabetic medication, but its use is limited by contraindications, primarily the risk of lactic acidosis.
• Guidelines exist for metformin use, particularly in patients with preserved renal function, to maximize its benefits while minimizing risks.

Purpose of the Study:

• To evaluate provider adherence to metformin prescribing guidelines in patients with diabetes and preserved renal function.
• To identify factors contributing to deviations from recommended metformin use in clinical practice.

Main Methods:

• Examination of a patient population with diabetes and preserved renal function.
• Analysis of reasons for withholding metformin, including contraindications, patient-specific factors, and provider-related influences.

Main Results:

• Metformin was withheld from approximately one-third of eligible patients with diabetes and preserved renal function.
• Reasons for withholding included existing contraindications, patient behavior or preference, and provider preference or bias.
• Despite general adherence, deviations from established metformin guidelines are common in practice.

Conclusions:

• While providers largely follow current metformin recommendations, practical application shows frequent divergence from guidelines.
• Factors beyond established contraindications, such as patient and provider preferences, significantly impact metformin prescribing decisions.