Drug interactions
Lidocaine-prilocaine + Nirmatrelvir
Severity: Minor
Lidocaine-prilocaine and Nirmatrelvir: minor 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
Nirmatrelvir inhibits CYP3A4 and may raise lidocaine levels. Because topical lidocaine-prilocaine produces low systemic exposure, the effect is usually small, but large-area or prolonged use could cause toxicity.
What this interaction means in plain words
Lidocaine-prilocaine and Nirmatrelvir have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Lidocaine-prilocaine belongs to Genitourinary; Nirmatrelvir belongs to Anti Virals.
Why it happens
Nirmatrelvir inhibits CYP3A4-mediated metabolism of lidocaine.
What to do
Restrict the cream to small areas of intact skin for short periods. Monitor for CNS and cardiac signs of lidocaine toxicity if more extensive use is needed.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Lidocaine-prilocaine
- Lidocaine-prilocaine + Phenazopyridine Major
- Bupivacaine implant + Lidocaine-prilocaine Moderate
- Bupivacaine liposome + Lidocaine-prilocaine Moderate
- Disopyramide + Lidocaine-prilocaine Moderate
- Elvitegravir / cobicistat / emtricitabine / tenofovir df + Lidocaine-prilocaine Moderate
- Lidocaine-prilocaine + Mexiletine Moderate
Other interactions of Nirmatrelvir
- Alfuzosin + Nirmatrelvir Contraindicated
- Amiodarone + Nirmatrelvir Contraindicated
- Apalutamide + Nirmatrelvir Contraindicated
- Carbamazepine + Nirmatrelvir Contraindicated
- Colchicine + Nirmatrelvir Contraindicated
- Dronedarone + Nirmatrelvir Contraindicated
Frequently asked questions
Can I take Lidocaine-prilocaine with Nirmatrelvir?
MediHelp rates the interaction as minor. Lidocaine-prilocaine and Nirmatrelvir have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Nirmatrelvir inhibits CYP3A4 and may raise lidocaine levels. Because topical lidocaine-prilocaine produces low systemic exposure, the effect is usually small, but large-area or prolonged use could cause toxicity.
How serious is the interaction between Lidocaine-prilocaine and Nirmatrelvir?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Restrict the cream to small areas of intact skin for short periods. Monitor for CNS and cardiac signs of lidocaine toxicity if more extensive use is needed.
What other medicines interact with Lidocaine-prilocaine?
MediHelp also lists interactions of Lidocaine-prilocaine with, for example, Phenazopyridine, Bupivacaine implant, Bupivacaine liposome. The full list is on the Lidocaine-prilocaine page.
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