Drug interactions
Bupivacaine liposome + Lidocaine
Severity: Major
Bupivacaine liposome and Lidocaine: 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
Non-bupivacaine local anesthetics such as lidocaine can disrupt the liposomal formulation and release free bupivacaine rapidly. This eliminates the prolonged-release profile and may increase the risk of systemic bupivacaine toxicity. Labeling advises against mixing and recommends a delay after lidocaine.
What this interaction means in plain words
Bupivacaine liposome and Lidocaine 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.
Why it happens
Lidocaine alters the liposomal carrier, causing rapid release of unencapsulated bupivacaine.
What to do
Do not mix the products in the same syringe. If lidocaine is used first, wait at least 20 minutes before infiltrating bupivacaine liposome.
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
Frequently asked questions
Can I take Bupivacaine liposome with Lidocaine?
MediHelp rates the interaction as major. Bupivacaine liposome and Lidocaine 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. Non-bupivacaine local anesthetics such as lidocaine can disrupt the liposomal formulation and release free bupivacaine rapidly. This eliminates the prolonged-release profile and may increase the risk of systemic bupivacaine toxicity. Labeling advises against mixing and recommends a delay after lidocaine.
How serious is the interaction between Bupivacaine liposome and Lidocaine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not mix the products in the same syringe. If lidocaine is used first, wait at least 20 minutes before infiltrating bupivacaine liposome.
What other medicines interact with Lidocaine?
MediHelp also lists interactions of Lidocaine with, for example, Disopyramide, Ex vivo expanded autologous human corneal epithelial cells containing stem cells, Nirmatrelvir / ritonavir. The full list is on the Lidocaine page.
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