Drug interactions
Lidocaine + Pimozide
Severity: Major
Lidocaine and Pimozide: major 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
Systemic lidocaine, such as intravenous use as an antiarrhythmic, may add to the QT-prolonging and proarrhythmic potential of pimozide. Pimozide is a high-risk QT-prolonging drug and torsades de pointes is a concern. Local anesthetic use gives minimal systemic exposure and is less relevant.
What this interaction means in plain words
Lidocaine and Pimozide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Lidocaine belongs to Cardiovascular; Pimozide belongs to Central Nervous System.
Why it happens
Additive cardiac electrophysiologic effects with pimozide-related QT prolongation.
What to do
Avoid systemic lidocaine with pimozide if possible, or monitor ECG continuously and keep potassium and magnesium normal. Prefer minimal doses for local anesthesia.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Lidocaine
- Bupivacaine liposome + Lidocaine Major
- Disopyramide + Lidocaine Major
- Ex vivo expanded autologous human corneal epithelial cells containing stem cells + Lidocaine Major
- Lidocaine + Nirmatrelvir / ritonavir Major
- Lidocaine + Ombitasvir / paritaprevir / ritonavir and dasabuvir Major
- Lidocaine + Procainamide Major
Other interactions of Pimozide
- Adagrasib + Pimozide Contraindicated
- Amiodarone + Pimozide Contraindicated
- Amisulpride + Pimozide Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amoxapine + Pimozide Contraindicated
- Anagrelide + Pimozide Contraindicated
Frequently asked questions
Can I take Lidocaine with Pimozide?
MediHelp rates the interaction as major. Lidocaine and Pimozide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Systemic lidocaine, such as intravenous use as an antiarrhythmic, may add to the QT-prolonging and proarrhythmic potential of pimozide. Pimozide is a high-risk QT-prolonging drug and torsades de pointes is a concern. Local anesthetic use gives minimal systemic exposure and is less relevant.
How serious is the interaction between Lidocaine and Pimozide?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid systemic lidocaine with pimozide if possible, or monitor ECG continuously and keep potassium and magnesium normal. Prefer minimal doses for local anesthesia.
What other medicines interact with Lidocaine?
MediHelp also lists interactions of Lidocaine with, for example, Bupivacaine liposome, Disopyramide, Ex vivo expanded autologous human corneal epithelial cells containing stem cells. The full list is on the Lidocaine page.
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