Lidocaine Topical and Chloroquine Interaction
Drug interaction information between Lidocaine Topical and Chloroquine.
Lidocaine Topical and Chloroquine have a documented moderate interaction in FDA labeling.
FDA drug labeling documents a moderate-severity interaction between Lidocaine Topical and Chloroquine. Major interactions are generally avoided, moderate ones may need monitoring or a dose adjustment, and minor ones are usually low-risk. This page shows the documented mechanism and guidance. Label-documented interactions are not a complete safety review, so always confirm your own medications with a pharmacist or doctor. Educational information, not medical advice.
How They Interact
Both drugs can interfere with how your blood carries oxygen, which can lead to a dangerous health issue. Combining them makes this problem more likely to happen.
What To Do
Use these drugs together only if your doctor says it is necessary and monitors you closely. Seek help immediately if your skin, lips, or fingernails look blue or gray.
FDA Label Information
Drugs That May Cause Methemoglobinemia When Used with LIDODERM Patients who are administered local anesthetics are at increased risk of developing methemoglobinemia when concurrently exposed to the following drugs, which could include other local anesthetics: Examples of Drugs Associated with Methemoglobinemia : Class Examples Nitrates/Nitrites nitric oxide, nitroglycerin, nitroprusside, nitrous oxide Local anesthetics articaine, benzocaine, bupivacaine, lidocaine, mepivacaine, prilocaine, procaine, ropivacaine, tetracaine Antineoplastic agents cyclophosphamide, flutamide, hydroxyurea,...
Lidocaine Topical Also Interacts With
- Acetaminophen moderate
- Nitrofurantoin moderate
- Valproate moderate
- Mexiletine moderate
- Nitroglycerin moderate
Chloroquine Also Interacts With
- Dapsone Topical moderate
- Hydroxychloroquine moderate
- Remdesivir moderate
- Methylprednisolone minor
Frequently Asked Questions
Can I take Lidocaine Topical and Chloroquine together?
This is a moderate interaction. Use these drugs together only if your doctor says it is necessary and monitors you closely. Seek help immediately if your skin, lips, or fingernails look blue or gray.
How serious is the interaction between Lidocaine Topical and Chloroquine?
This interaction is classified as "moderate" severity by the FDA. Moderate interactions may worsen your condition or change how your medications work.
Why do Lidocaine Topical and Chloroquine interact?
Both drugs can interfere with how your blood carries oxygen, which can lead to a dangerous health issue. Combining them makes this problem more likely to happen.
Understanding the Lidocaine Topical and Chloroquine Interaction
FDA-approved prescribing information for these two drugs flags their combination as a moderate-severity interaction. Lidocaine Topical belongs to the Topical Anesthetic class and Chloroquine belongs to the Antimalarial class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Both drugs can interfere with how your blood carries oxygen, which can lead to a dangerous health issue. Severity tiers matter: major flags generally advise avoidance, moderate flags often require monitoring or dose adjustment, and minor flags may only call for awareness.
Context around a specific patient determines real-world impact. Lidocaine Topical has 10 total documented interactions on file in this dataset, and Chloroquine has 5. Each additional medication compounds the interaction surface, which is why pharmacists run full-profile checks rather than evaluating one pair at a time. FDA-derived guidance for this pair is: Use these drugs together only if your doctor says it is necessary and monitors you closely. Timing of doses, renal and hepatic function, age, and other concurrent prescriptions all shape whether a labeled interaction matters clinically.
An interaction flag is not a verdict. A large share of labeled interactions are managed routinely in clinical practice, the fix may be as simple as spacing doses or adding a monitoring test. Others require the prescriber to choose a different medication entirely. This page surfaces FDA-sourced labeling and openFDA data for educational purposes only; it is not medical advice and cannot account for your full clinical picture. Never start, stop, or adjust either Lidocaine Topical or Chloroquine based on a web page, speak with your prescriber or pharmacist before making any change.
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. Always consult your healthcare provider about drug interactions.
Read our methodology - how this data is sourced, computed, and verified.