Drug interactions
Lofexidine + Olanzapine
Severity: Moderate
Lofexidine 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
Both drugs can cause sedation, and both are associated with QT prolongation. Lofexidine also lowers blood pressure and heart rate, which may add to olanzapine's orthostatic hypotension.
What this interaction means in plain words
Lofexidine 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.
Lofexidine belongs to Central Nervous System; Olanzapine belongs to Central Nervous System.
Why it happens
Additive CNS depression, QT prolongation and hypotensive effects.
What to do
Check ECG at baseline and when doses change, and monitor blood pressure, heart rate and sedation. Correct potassium and magnesium abnormalities.
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 Lofexidine
- Adagrasib + Lofexidine Major
- Alfuzosin + Lofexidine Major
- Amiodarone + Lofexidine Major
- Amisulpride + Lofexidine Major
- Anagrelide + Lofexidine Major
- Apomorphine + Lofexidine Major
Frequently asked questions
Can I take Lofexidine with Olanzapine?
MediHelp rates the interaction as moderate. Lofexidine 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. Both drugs can cause sedation, and both are associated with QT prolongation. Lofexidine also lowers blood pressure and heart rate, which may add to olanzapine's orthostatic hypotension.
How serious is the interaction between Lofexidine 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: Check ECG at baseline and when doses change, and monitor blood pressure, heart rate and sedation. Correct potassium and magnesium abnormalities.
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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