Altropane (O-587, IACFT, 2ò-carbomethoxy-3ò-(4-fluorophenyl)-N-((E)-3-iodo-prop-2-enyl)tropane) is a phenyltropane derivative which acts as a potent dopamine reuptake inhibitor and long-acting stimulant drug. It has mainly been used as the <sup>125</sup>I radiolabelled form for mapping the distribution of dopamine transporters in the brain, and consequently this has led to its development as a potential diagnostic tool for early detection of Parkinson's disease. It is also being investigated for potential use in the diagnosis and treatment of attention deficit hyperactivity disorder (ADHD).