A Case of Psychosis and Renal Failure Associated withExcessive Energy Drink Consumption

Energy drinks are nonalcoholic beverages that are widely consumed in the general population, and worldwide usage is increasing.The main stimulant component of energy drinks is typically caffeine. Few case reports exist that link energy drink consumptionto psychosis, and similarly few reports exist that associate energy drink consumption with acute renal failure. We present a patientwho simultaneously developed psychosis and acute renal failure associated with excessive energy drink consumption. The patientrequired haemodialysis, and his psychosis resolved on cessation of energy drinks and a brief course of antipsychotic medication.We perform a review of similar cases where excessive caffeinated energy drink consumption has been linked to psychosis or acuterenal failure. To our knowledge, this is the first case report describing both renal failure and psychosis occurring simultaneously ina patient. Recognising the spectrum of disorders associated with excessive energy drink consumption is vital for both physiciansand psychiatrists, as this has important implications for both prognosis and treatment.