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bupivacaine hydrochloride injection, USP - SPINAL Drug Interactions

7 DRUG INTERACTIONS

7.1 Local Anesthetics

The toxic effects of local anesthetics are additive. If coadministration of other local anesthetics with BUPIVACAINE 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 BUPIVACAINE 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:

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, isofamide, rasburicase

Antibiotics

dapsone, nitrofurantoin, para-aminosalicylic acid, sulfonamides

Antimalarials

chloroquine, primaquine

Anticonvulsants

phenobarbital, phenytoin, sodium valproate

Other drugs

acetaminophen, metoclopramide, quinine, sulfasalazine

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