Drug interactions
Buprenorphine subdermal implant + Pimavanserin
Severity: Moderate
Buprenorphine subdermal implant and Pimavanserin: 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
Pimavanserin prolongs the QT interval, and buprenorphine has a modest QT effect. Combined use may add to the risk of arrhythmia, especially in patients with other QT risk factors.
What this interaction means in plain words
Buprenorphine subdermal implant and Pimavanserin 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.
Why it happens
Additive QT prolongation through effects on cardiac repolarization.
What to do
Check a baseline ECG and electrolytes, and repeat the ECG if other QT-prolonging drugs are added or symptoms such as syncope or palpitations occur. Avoid the combination in patients with congenital long QT syndrome.
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 Pimavanserin
- Lefamulin + Pimavanserin Contraindicated
- Pimavanserin + Pimozide Contraindicated
- Pimavanserin + Vandetanib Contraindicated
- Adagrasib + Pimavanserin Major
- Amiodarone + Pimavanserin Major
- Amisulpride + Pimavanserin Major
Frequently asked questions
Can I take Buprenorphine subdermal implant with Pimavanserin?
MediHelp rates the interaction as moderate. Buprenorphine subdermal implant and Pimavanserin 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. Pimavanserin prolongs the QT interval, and buprenorphine has a modest QT effect. Combined use may add to the risk of arrhythmia, especially in patients with other QT risk factors.
How serious is the interaction between Buprenorphine subdermal implant and Pimavanserin?
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 a baseline ECG and electrolytes, and repeat the ECG if other QT-prolonging drugs are added or symptoms such as syncope or palpitations occur. Avoid the combination in patients with congenital long QT syndrome.
What other medicines interact with Pimavanserin?
MediHelp also lists interactions of Pimavanserin with, for example, Lefamulin, Pimozide, Vandetanib. The full list is on the Pimavanserin page.
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