Drug interactions
Metformin-sitagliptin + Quetiapine
Severity: Moderate
Metformin-sitagliptin and Quetiapine: 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
Quetiapine is associated with weight gain, hyperglycemia and dyslipidemia, which can undermine glycemic control achieved with metformin and sitagliptin. The effect varies between patients and may emerge over weeks to months.
What this interaction means in plain words
Metformin-sitagliptin and Quetiapine 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-sitagliptin belongs to Endocrine; Quetiapine belongs to Central Nervous System.
Why it happens
Atypical antipsychotics induce insulin resistance and weight gain, producing pharmacodynamic opposition to antidiabetic therapy.
What to do
Monitor fasting glucose and HbA1c after starting quetiapine and periodically thereafter, and intensify antidiabetic therapy as needed.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Metformin-sitagliptin and Quetiapine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Metformin-sitagliptin
Other interactions of Quetiapine
- Adagrasib + Quetiapine Major
- Amiodarone + Quetiapine Major
- Amisulpride + Quetiapine Major
- Amoxapine + Quetiapine Major
- Anagrelide + Quetiapine Major
- Apalutamide + Quetiapine Major
Frequently asked questions
Can I take Metformin-sitagliptin with Quetiapine?
MediHelp rates the interaction as moderate. Metformin-sitagliptin and Quetiapine 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. Quetiapine is associated with weight gain, hyperglycemia and dyslipidemia, which can undermine glycemic control achieved with metformin and sitagliptin. The effect varies between patients and may emerge over weeks to months.
How serious is the interaction between Metformin-sitagliptin and Quetiapine?
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 fasting glucose and HbA1c after starting quetiapine and periodically thereafter, and intensify antidiabetic therapy as needed.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
