Drug interactions
Leuprolide + Olanzapine
Severity: Moderate
Leuprolide 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
Androgen deprivation with leuprolide can prolong the QT interval, and olanzapine may add a small effect. Risk is higher with electrolyte disturbance or cardiac disease.
What this interaction means in plain words
Leuprolide 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.
Leuprolide belongs to Endocrine; Olanzapine belongs to Central Nervous System.
Why it happens
Additive QT prolongation; leuprolide effect arises from androgen suppression.
What to do
Obtain baseline ECG and electrolytes and monitor periodically in at-risk patients. Review other QT-prolonging drugs.
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 Leuprolide
- Leuprolide + Pimozide Contraindicated
- Leuprolide + Thioridazine Contraindicated
- Amisulpride + Leuprolide Major
- Arsenic trioxide + Leuprolide Major
- Artemether / lumefantrine + Leuprolide Major
- Disopyramide + Leuprolide Major
Frequently asked questions
Can I take Leuprolide with Olanzapine?
MediHelp rates the interaction as moderate. Leuprolide 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. Androgen deprivation with leuprolide can prolong the QT interval, and olanzapine may add a small effect. Risk is higher with electrolyte disturbance or cardiac disease.
How serious is the interaction between Leuprolide 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: Obtain baseline ECG and electrolytes and monitor periodically in at-risk patients. Review other QT-prolonging drugs.
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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