Drug interactions
Insulin degludec + Metformin-sitagliptin
Severity: Moderate
Insulin degludec and Metformin-sitagliptin: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Combining insulin with metformin and sitagliptin gives additive glucose lowering. This is a common and intended combination, but it increases the risk of hypoglycemia, mostly from the insulin component.
What this interaction means in plain words
Insulin degludec and Metformin-sitagliptin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Insulin degludec belongs to Endocrine; Metformin-sitagliptin belongs to Endocrine.
Why it happens
Additive pharmacodynamic glucose lowering through different pathways: exogenous insulin, reduced hepatic glucose output, and incretin enhancement.
What to do
Monitor blood glucose and consider lowering the insulin dose when starting the combination, especially if HbA1c is near target.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Metformin-sitagliptin
Other interactions of Insulin degludec
Frequently asked questions
Can I take Insulin degludec with Metformin-sitagliptin?
MediHelp rates the interaction as moderate. Insulin degludec and Metformin-sitagliptin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Combining insulin with metformin and sitagliptin gives additive glucose lowering. This is a common and intended combination, but it increases the risk of hypoglycemia, mostly from the insulin component.
How serious is the interaction between Insulin degludec and Metformin-sitagliptin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood glucose and consider lowering the insulin dose when starting the combination, especially if HbA1c is near target.
What other medicines interact with Metformin-sitagliptin?
MediHelp also lists interactions of Metformin-sitagliptin with, for example, Clozapine, Contrast media, Diatrizoate meglumine / diatrizoate. The full list is on the Metformin-sitagliptin page.
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