Drug interactions
Pitolisant + Quetiapine
Severity: Moderate
Pitolisant and Quetiapine: 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
Pitolisant can prolong the QT interval, and quetiapine has a similar effect, so combined use may increase the risk of ventricular arrhythmias. The risk rises with electrolyte disturbances or other risk factors.
What this interaction means in plain words
Pitolisant and Quetiapine 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.
Pitolisant belongs to Central Nervous System; Quetiapine belongs to Central Nervous System.
Why it happens
Additive QT prolongation; pitolisant also has H3 antagonist effects that may counter sedation.
What to do
Avoid in patients with QT risk factors. If used together, obtain a baseline ECG, correct electrolytes and monitor QTc.
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 Quetiapine
- Adagrasib + Quetiapine Major
- Amiodarone + Quetiapine Major
- Amisulpride + Quetiapine Major
- Amoxapine + Quetiapine Major
- Anagrelide + Quetiapine Major
- Apalutamide + Quetiapine Major
Other interactions of Pitolisant
- Alfuzosin + Pitolisant Major
- Amiodarone + Pitolisant Major
- Amisulpride + Pitolisant Major
- Anagrelide + Pitolisant Major
- Asenapine + Pitolisant Major
- Bupropion + Pitolisant Major
Frequently asked questions
Can I take Pitolisant with Quetiapine?
MediHelp rates the interaction as moderate. Pitolisant and Quetiapine 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. Pitolisant can prolong the QT interval, and quetiapine has a similar effect, so combined use may increase the risk of ventricular arrhythmias. The risk rises with electrolyte disturbances or other risk factors.
How serious is the interaction between Pitolisant and Quetiapine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid in patients with QT risk factors. If used together, obtain a baseline ECG, correct electrolytes and monitor QTc.
What other medicines interact with Quetiapine?
MediHelp also lists interactions of Quetiapine with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Quetiapine page.
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