Despite the fact that caffeine is the most commonly used stimulant in modern society, cases of caffeine overdose are relatively rare, with fatalities reported from doses of 10 g and higher (Nord J Psychiatry. 2006;60:97-106). Large doses produce symptoms associated with stimulation of the cardiovascular, central nervous, and gastrointestinal symptoms (Associates of the California Poison Control Center, Poisoning and Drug Overdose, pp. 142-143. 5th Ed). We present the first reported case of a man with delayed presentation to the emergency department after ingesting 24 g of caffeine in a suicide attempt who suffered complications of severe rhabdomyolysis and acute renal failure requiring subsequent hemodialysis.