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MARCAINE - SPINAL Drug Interactions (bupivacaine hydrochloride injection, USP - SPINAL)


7.1 Local Anesthetics

The toxic effects of local anesthetics are additive. If coadministration of other local anesthetics with MARCAINE SPINAL 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 (5.3)].

7.2 Drugs Associated with Methemoglobinemia

Patients who are administered MARCAINE SPINAL are at increased risk of developing methemoglobinemia when concurrently exposed to the following drugs, which could include other local anesthetics [see Warnings and Precautions (5.5)].

Examples of Drugs Associated with Methemoglobinemia:

Nitrates/Nitritesnitric oxide, nitroglycerin, nitroprusside, nitrous oxide
Local anestheticsarticaine, benzocaine, bupivacaine, lidocaine, mepivacaine, prilocaine, procaine, ropivacaine, tetracaine
Antineoplastic agentscyclophosphamide, flutamide, hydroxyurea, isofamide, rasburicase
Antibioticsdapsone, nitrofurantoin, para-aminosalicylic acid, sulfonamides
Antimalarialschloroquine, primaquine
Anticonvulsantsphenobarbital, phenytoin, sodium valproate
Other drugsacetaminophen, metoclopramide, quinine, sulfasalazine
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