Repaglinide and Sitagliptin and metformin interaction
Repaglinide and Sitagliptin and metformin: both prescribing labels describe an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Repaglinide label · effective 2025-05-02
Factors which may increase the risk of hypoglycemia include changes in meal pattern (e.g., macronutrient content), changes in level of physical activity, changes to co-administered medication [see Drug Interactions (7) ] , and concomitant use with other antidiabetic agents.
Drugs That May Decrease the Blood Glucose Lowering Effect of Repaglinide Tablets Intervention: Repaglinide tablets dose increases and increased frequency of glucose monitoring may be required when co-administered.
CYP2C8 and CYP3A4 Inducers and Drugs That May Decrease the Blood Glucose Lowering Effect of repaglinide tablets : Co-administration may require repaglinide tablets dose increases and increased frequency of glucose monitoring ( 7 )
Examples: Antidiabetic agents, ACE inhibitors, angiotensin II receptor blocking agents, disopyramide, fibrates, fluoxetine, monoamine oxidase inhibitors, nonsteroidal anti-inflammatory agents (NSAIDs), pentoxifylline, pramlintide, propoxyphene, salicylates, somatostatin analogs (e.g., octreotide), and sulfonamide antibiotics.
From the Sitagliptin and metformin (JANUMET XR) label · effective 2026-08-11
Hypoglycemia with Concomitant Use with Insulin or Insulin Secretagogues: Increased risk of hypoglycemia when used in combination with insulin and/or an insulin secretagogue.
A lower dose of insulin or insulin secretagogue may be required.
Hypoglycemia with Concomitant Use with Insulin or Insulin Secretagogues JANUMET XR may increase the risk of hypoglycemia when combined with insulin and/or an insulin secretagogue (e.g., sulfonylurea) [see Adverse Reactions (6) ] .
A lower dose of insulin or insulin secretagogue may be required to minimize the risk of hypoglycemia when used in combination with JANUMET XR [see Drug Interactions (7) ] .
Insulin Secretagogues or Insulin Clinical Impact: Coadministration of JANUMET XR with an insulin secretagogue (e.g., sulfonylurea) or insulin may increase the risk of hypoglycemia.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.