Key takeaways
- Metformin is a biguanide; glipizide is a sulfonylurea.
- A clinician reviews glucose history, kidney and liver considerations, other medicines, and low-blood-sugar risk before choosing a plan.
- They may appear in the same care plan, but they are not substitutes and should not be changed without clinical guidance.
How they compare
EDITORIAL GUIDETopicMetforminmetformin hydrochlorideGlipizideglipizide
Medication familyBiguanideSulfonylurea
Common discussionBlood-glucose management in eligible adults with type 2 diabetesBlood-glucose management in eligible adults with type 2 diabetes
Product formImmediate- and extended-release oral tabletsImmediate- and extended-release oral tablets
AccessPrescription requiredPrescription required
DecisionRequires an individual clinician reviewRequires an individual clinician review
Primary sources
Labeling can change. Use the current FDA prescribing information and speak with a licensed clinician or pharmacist before making a treatment decision.