A 22-year-old male with a past medical history of anxiety and depression presents with acute psychosis after ingesting 3.5 grams of marijuana. He takes vortioxetine at home. On presentation, he was found agitated, throwing himself against walls. AST and ALT were 187 U/L and 44 U/L on admission. Five days later, AST and ALT increased to 1,402 U/L and 402 U/L. All other liver chemistry tests, hemoglobin, white blood cell count, and INR are normal. What is the most likely cause of his abnormal liver chemistry tests?