Bupivacaine and Cocaine interaction
Bupivacaine and Cocaine: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Bupivacaine (Marcaine) label · effective 2026-06-24
If coadministration of other local anesthetics with MARCAINE / MARCAINE WITH EPINEPHRINE cannot be avoided, monitor patients for neurologic and cardiovascular effects related to local anesthetic systemic toxicity [see Dosage and Administration (2.1), Warnings and Precautions (5.2)].
Drugs Associated with Methemoglobinemia Patients who are administered MARCAINE / MARCAINE WITH EPINEPHRINE are at increased risk of developing methemoglobinemia when concurrently exposed to the following drugs, which could include other local anesthetics [see Warnings and Precautions (5.3)].
Monitor for neurologic and cardiovascular effects when additional local anesthetics are administered.
From the Cocaine (NUMBRINO) label · effective 2026-01-12
NUMBRINO is contraindicated in: patients with a known history of hypersensitivity to cocaine hydrochloride, other ester-based local anesthetics, or any other component of the nasal solution [see Warnings and Precautions ( 5.5 )] .
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.