Drug interactions
Lidocaine + Pefloxacin
Severity: Moderate
Lidocaine and Pefloxacin: 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
Fluoroquinolones that inhibit CYP1A2 can reduce lidocaine clearance and raise its concentrations. Pefloxacin is a CYP1A2 inhibitor and this may lead to lidocaine toxicity with systemic or repeated dosing.
What this interaction means in plain words
Lidocaine and Pefloxacin 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.
Lidocaine belongs to Cardiovascular; Pefloxacin belongs to Anti Bacterial.
Why it happens
Inhibition of CYP1A2-mediated lidocaine metabolism reduces clearance.
What to do
With systemic lidocaine infusion, monitor for signs of toxicity and consider dose reduction; no change is usually needed for single local anesthetic doses.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Lidocaine and Pefloxacin, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
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 + Pimozide Major
Other interactions of Pefloxacin
- Pefloxacin + Tizanidine Contraindicated
- Clozapine + Pefloxacin Major
- Duloxetine + Pefloxacin Major
- Pefloxacin + Theophylline Major
- Asenapine + Pefloxacin Moderate
- Caffeine + Pefloxacin Moderate
Frequently asked questions
Can I take Lidocaine with Pefloxacin?
MediHelp rates the interaction as moderate. Lidocaine and Pefloxacin 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. Fluoroquinolones that inhibit CYP1A2 can reduce lidocaine clearance and raise its concentrations. Pefloxacin is a CYP1A2 inhibitor and this may lead to lidocaine toxicity with systemic or repeated dosing.
How serious is the interaction between Lidocaine and Pefloxacin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: With systemic lidocaine infusion, monitor for signs of toxicity and consider dose reduction; no change is usually needed for single local anesthetic doses.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
