Drug interactions
Metformin-sitagliptin + Olanzapine
Severity: Moderate
Metformin-sitagliptin and Olanzapine: 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
Olanzapine commonly causes weight gain, insulin resistance and hyperglycemia. This can worsen diabetes control and offset the benefit of metformin and sitagliptin.
What this interaction means in plain words
Metformin-sitagliptin and Olanzapine 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; Olanzapine belongs to Central Nervous System.
Why it happens
Pharmacodynamic antagonism through antipsychotic-induced insulin resistance and impaired glucose regulation.
What to do
Monitor weight, fasting glucose and HbA1c at baseline and regularly during olanzapine therapy, and intensify antidiabetic treatment if 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?
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Other interactions of Metformin-sitagliptin
Other interactions of Olanzapine
Frequently asked questions
Can I take Metformin-sitagliptin with Olanzapine?
MediHelp rates the interaction as moderate. Metformin-sitagliptin and Olanzapine 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. Olanzapine commonly causes weight gain, insulin resistance and hyperglycemia. This can worsen diabetes control and offset the benefit of metformin and sitagliptin.
How serious is the interaction between Metformin-sitagliptin and Olanzapine?
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 weight, fasting glucose and HbA1c at baseline and regularly during olanzapine therapy, and intensify antidiabetic treatment if 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.
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