Drug interactions
Insulin lispro + Olanzapine
Severity: Moderate
Insulin lispro 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 may cause hyperglycemia and insulin resistance, reducing the effect of insulin lispro. Patients may need higher insulin doses to maintain control.
What this interaction means in plain words
Insulin lispro 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.
Insulin lispro belongs to Endocrine; Olanzapine belongs to Central Nervous System.
Why it happens
Olanzapine induces insulin resistance and weight gain, opposing insulin action.
What to do
Monitor glucose frequently when olanzapine is started or adjusted, and adjust insulin lispro doses. Check HbA1c and weight periodically.
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 Olanzapine
Other interactions of Insulin lispro
Frequently asked questions
Can I take Insulin lispro with Olanzapine?
MediHelp rates the interaction as moderate. Insulin lispro 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 may cause hyperglycemia and insulin resistance, reducing the effect of insulin lispro. Patients may need higher insulin doses to maintain control.
How serious is the interaction between Insulin lispro 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 glucose frequently when olanzapine is started or adjusted, and adjust insulin lispro doses. Check HbA1c and weight periodically.
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.
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