Ephedrine abuse causing acute myocardial infarction.

"On the street", the more expensive illegal psychostimulants, such as cocaine or amphetamine, may be mixed with or substituted for cheaper drugs such as ephedrine-with added risk to the user. We report diffuse myocardial injury in a 25-year-old man who presented with pulmonary oedema after intravenously injecting himself with ephedrine, believing it to be amphetamine.