Underreporting Supplements: A Case of Drug-induced Liver Injury Due to a Testosterone Booster.

Acute liver injuries (ALIs) are caused by a wide range of etiologies, and determining the cause can often be challenging. Detailed history taking is essential in patients with liver injuries to promptly determine the underlying source of injury and for timely treatment and prognosis. A 27-year-old active duty man presented to the emergency department (ED) with jaundice. On medication reconciliation, he only reported taking acetaminophen for a recent upper respiratory infection. The patient had an ALI and was treated with N-acetyl cysteine for presumed acetaminophen toxicity. Initially, his liver-associated enzymes (LAEs) improved, but 2 weeks after discharge, he returned to the ED upon referral from ship medical for jaundice and worsening liver injury. Repeated query into the patient's history revealed that he was using a testosterone booster supplement for 6 months preceding initial hospitalization. After evaluation of other etiologies for liver injury returned negative, drug-induced liver injury from the testosterone booster was determined to be the underlying etiology. With discontinuation of the supplement, his liver injury improved. Hepatotoxicity is a major concern in supplement use; however, it is largely underreported. Supplements are often not recognized or reported as medications by patients, leading to failure to identify them as potential toxicants. This case highlights the importance of including supplement education and questioning in the evaluation of ALI and maintaining a high index of suspicion when other common etiologies of liver disease are negative.