INTRODUCTION: Bupivacaine is local anesthetic (1). Very few cases of bupivacaine induced liver injury have been noted in the literature; we report a case of this very rare side effect (2). CASE DESCRIPTION/METHODS: A 69-year-old male patient underwent a right inguinal herniorrhaphy. One week after the surgery, patient began to have nausea, vomiting, fever, and dark brown urine. Stools were normal and there was no pruritis. There was no previous history of jaundice, chronic liver disease or malignancy. New medication use, alcohol, illicit drug use, risky sexual behavior was negative. On examination, vitals were all within normal limits. Icterus was present but otherwise his skin was only remarkable for the left lower quadrant scar, which was healing well without surrounding erythema or purulent discharge. Liver function tests were notable for a total bilirubin of 17.4 mg/dL, direct bilirubin was 10.8 mg /dL,. AST was 355 U/L, ALT was 570 U/L, alkaline phosphatase was 944 U/L, LDH was 315 U/L. Viral, autoimmune and structural causes of acute hepatitis were excluded. Given the negative evaluation, a retrospective review of medications received during and after surgery was performed, and the patient was found to have received bupivacaine via PCA post-operatively. As all the other options were excluded, the patient was diagnosed with liver injury from bupivacaine. The patient was managed conservatively and recovered fully in about four weeks. DISCUSSION: Bupivacaine is a local anesthetic which can be given through elastomer pumps for pain control (1). There are case reports in the literature that suggested bupivacaine can cause liver injury when given for more than one week (2,3). DILI is a diagnosis of exclusion (2,4). The common causes of liver injury such as drugs, alcohol, viruses, autoimmune diseases and biliary tract abnormalities need to be excluded (4). The diagnosis can be established with the help of Naranjo criteria (5) (Table 1). Most of these liver injuries respond to conservative management. There have been no reports of any acute or chronic liver failure in such cases. If the patient is at high risk of liver injury then they should receive local anesthetic agent other than bupivacaine (3).
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