GMC Number: 3547522

Consultant Psychiatrist & Addiction Medicine Specialist.

Honorary Clinical Professor, Institute of Epidemiology and Health Care. UCL Faculty of Population Health Sciences.

Founder Global Drug Survey.

I am have been a Consultant Psychiatrist and Addiction Medicine Specialist for 20 years. I believe honest, transparent, and informed clinical assessment is required to craft optimal treatment plans for people I try to help. My aim is to help people improve their quality of life and increase the control they have over it, whilst minimising their risk of harm.

I am an internationally recognised expert in my field and have a high level of expertise in the assessment and management of all substance-related problems and common associated mental health diagnoses.

Beyond alcohol, opioids and prescription medication, I have additional expertise in the assessment and treatment of problems related to the use of cannabis (including medical cannabis & prescribing), cocaine and methamphetamine, party drugs, ‘Chem Sex’, GHB and pain management. I have experience in working with young people and families as well as people from all gender identity backgrounds. I have spent most of my working life in public health systems in the UK and Australia. I have published over 130 academic papers and book chapters. I also run Global Drug Survey the world’s largest drug survey and have created a range of free online assessment tools and apps.


  • Addictions (alcohol and other drugs including cannabis, heroin, prescription opioids, benzodiazepines, cocaine and novel drugs.
  • Depression
  • Anxiety
  • ADHD
  • Chronic Pain