A LITTLE LIGHTBULB MOMENT
Drugs · Endocrinology
metformin: biguanide
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METFORMIN minds kidneys and B12.
The idea behind the cue
Type 2 diabetes. Reduces hepatic glucose production and improves insulin sensitivity. Key safety: Lactic acidosis risk in susceptible settings; vitamin B12 reduction. Monitor: eGFR, glycemic response and B12 when indicated. Counseling: Follow specific illness/contrast instructions; report concerning severe symptoms.
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Short & simple
METFORMIN minds kidneys and B12.
Acronym
METFORMIN minds kidneys and B12.
Story
Type 2 diabetes. Reduces hepatic glucose production and improves insulin sensitivity. Key safety: Lactic acidosis risk in susceptible settings; vitamin B12 reduction. Monitor: eGFR, glycemic response and B12 when indicated. Counseling: Follow specific illness/contrast instructions; report concerning severe symptoms.
Connect the pieces
- Role: Type 2 diabetes
- Mechanism: Reduces hepatic glucose production and improves insulin sensitivity
- Safety: Lactic acidosis risk in susceptible settings; vitamin B12 reduction
- Monitor: eGFR, glycemic response and B12 when indicated
- Counseling: Follow specific illness/contrast instructions; report concerning severe symptoms
Know the limits
A focused drug study point, not a complete dosing or prescribing reference. Check indication, formulation, patient factors and the linked label.
DailyMed: METFORMIN HYDROCHLORIDE TABLET, FILM COATED, EXTENDED RELEASE [GLENMARK PHARMACEUTICALS INC., USA] ↗Check your understanding
A patient taking metformin develops declining renal function. Which parameter directly informs labeled renal-use restrictions?
A. Urine glucose alone as a substitute for kidney-function assessment.
B. Serum transaminases alone, regardless of renal filtration.
C. Estimated glomerular filtration rate.
D. INR as a surrogate for metformin clearance.
Reveal explanation
Estimated glomerular filtration rate.
Renal function affects metformin accumulation and lactic-acidosis risk. eGFR-specific labeling guides continuation/initiation decisions.