Drug interactions
Ciprofloxacin + Lidocaine
Severity: Moderate
Ciprofloxacin and Lidocaine: 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
Ciprofloxacin inhibits CYP1A2 and can reduce lidocaine clearance, raising plasma levels. This matters mainly with systemic or repeated lidocaine, where toxicity could present as dizziness, tremor, seizures or arrhythmia.
What this interaction means in plain words
Ciprofloxacin and Lidocaine 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.
Ciprofloxacin belongs to Anti Bacterial; Lidocaine belongs to Cardiovascular.
Why it happens
Ciprofloxacin inhibits CYP1A2-mediated metabolism of lidocaine, which increases systemic exposure.
What to do
For systemic lidocaine, monitor ECG and watch for neurological signs of toxicity, with dose reduction if needed. No action is usually needed for brief local anesthetic use.
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 Ciprofloxacin
- Agomelatine + Ciprofloxacin Contraindicated
- Ciprofloxacin + Fezolinetant Contraindicated
- Ciprofloxacin + Thioridazine Contraindicated
- Ciprofloxacin + Tizanidine Contraindicated
- Ciprofloxacin + Vandetanib Contraindicated
- Alosetron + Ciprofloxacin Major
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
Frequently asked questions
Can I take Ciprofloxacin with Lidocaine?
MediHelp rates the interaction as moderate. Ciprofloxacin and Lidocaine 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. Ciprofloxacin inhibits CYP1A2 and can reduce lidocaine clearance, raising plasma levels. This matters mainly with systemic or repeated lidocaine, where toxicity could present as dizziness, tremor, seizures or arrhythmia.
How serious is the interaction between Ciprofloxacin and Lidocaine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: For systemic lidocaine, monitor ECG and watch for neurological signs of toxicity, with dose reduction if needed. No action is usually needed for brief local anesthetic use.
What other medicines interact with Ciprofloxacin?
MediHelp also lists interactions of Ciprofloxacin with, for example, Agomelatine, Fezolinetant, Thioridazine. The full list is on the Ciprofloxacin page.
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