Drug interactions
Liraglutide + Metformin-sitagliptin
Severity: Moderate
Liraglutide 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
Liraglutide with metformin is a standard combination, but adding sitagliptin duplicates incretin-based therapy because both act on the GLP-1 pathway. This offers little added glucose lowering and adds adverse effect burden, such as gastrointestinal symptoms and possibly pancreatitis.
What this interaction means in plain words
Liraglutide 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.
Liraglutide belongs to Endocrine; Metformin-sitagliptin belongs to Endocrine.
Why it happens
Liraglutide is a GLP-1 receptor agonist and sitagliptin is a DPP-4 inhibitor, giving overlapping incretin effects.
What to do
Avoid using a DPP-4 inhibitor together with a GLP-1 receptor agonist; stop sitagliptin if liraglutide is started and monitor glucose.
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 Liraglutide
Frequently asked questions
Can I take Liraglutide with Metformin-sitagliptin?
MediHelp rates the interaction as moderate. Liraglutide 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. Liraglutide with metformin is a standard combination, but adding sitagliptin duplicates incretin-based therapy because both act on the GLP-1 pathway. This offers little added glucose lowering and adds adverse effect burden, such as gastrointestinal symptoms and possibly pancreatitis.
How serious is the interaction between Liraglutide 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: Avoid using a DPP-4 inhibitor together with a GLP-1 receptor agonist; stop sitagliptin if liraglutide is started and monitor glucose.
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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