Drug interactions
Insulin degludec / insulin aspart + Metformin-sitagliptin
Severity: Moderate
Insulin degludec / insulin aspart 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
Metformin and sitagliptin are commonly combined with insulin, but together they add to glucose lowering and can increase the risk of hypoglycemia. Insulin dose often needs to be lowered when these agents are added.
What this interaction means in plain words
Insulin degludec / insulin aspart 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.
Why it happens
Additive glucose-lowering effects through different pathways, with insulin driving hypoglycemia risk.
What to do
Monitor blood glucose when starting or stopping either oral agent and consider reducing the insulin dose when adding sitagliptin or metformin.
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
Frequently asked questions
Can I take Insulin degludec / insulin aspart with Metformin-sitagliptin?
MediHelp rates the interaction as moderate. Insulin degludec / insulin aspart 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. Metformin and sitagliptin are commonly combined with insulin, but together they add to glucose lowering and can increase the risk of hypoglycemia. Insulin dose often needs to be lowered when these agents are added.
How serious is the interaction between Insulin degludec / insulin aspart 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 when starting or stopping either oral agent and consider reducing the insulin dose when adding sitagliptin or metformin.
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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