Drug interactions
Glimepiride + Olanzapine
Severity: Moderate
Glimepiride 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 hyperglycaemia, which can reduce the effect of glimepiride. Blood glucose control may worsen after olanzapine is started or increased, and may need escalation of diabetes treatment.
What this interaction means in plain words
Glimepiride 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.
Glimepiride belongs to Endocrine; Olanzapine belongs to Central Nervous System.
Why it happens
Pharmacodynamic antagonism: olanzapine-induced insulin resistance and impaired insulin secretion oppose sulfonylurea action.
What to do
Monitor fasting glucose and HbA1c at the start of and during olanzapine therapy and adjust glimepiride or add therapy as needed. Consider a more metabolically neutral antipsychotic if control is difficult.
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 Glimepiride and Olanzapine, 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 Olanzapine
Other interactions of Glimepiride
Frequently asked questions
Can I take Glimepiride with Olanzapine?
MediHelp rates the interaction as moderate. Glimepiride 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 hyperglycaemia, which can reduce the effect of glimepiride. Blood glucose control may worsen after olanzapine is started or increased, and may need escalation of diabetes treatment.
How serious is the interaction between Glimepiride 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 fasting glucose and HbA1c at the start of and during olanzapine therapy and adjust glimepiride or add therapy as needed. Consider a more metabolically neutral antipsychotic if control is difficult.
What other medicines interact with Olanzapine?
MediHelp also lists interactions of Olanzapine with, for example, Amisulpride, Amoxapine, Apomorphine. The full list is on the Olanzapine 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.
