Dr. David Caldicott is an Irish Emergency Consultant at the Emergency Department of the Calvary Hospital in Canberra, Australian Capital Territory. He was the convenor of the OzTox Collaboration, an independent multidisciplinary, hospital-based research group committed to a harm minimisation approach to illicit drug use. He has been an outspoken critic of politicians supporting 'zero-tolerance' and prohibitionist drugs policy, questioning the evidence of their efficacy in preventing morbidity and mortality from illicit substances. He believes that drugs policy should not be guided by moral values, but by interventions known to have an effect on users’ behaviour. He was a strong advocate for a pill testing program in South Australia, as recommended by the 2002 Drugs Summit.