National Poisons Information Service (UK) - NPIS
Drugscope - (formerly: the U.K. Institute for the Study of Drug Dependence)
United Nations International Drugs Control Programme - UNDCP
World Health Organisation Substance Abuse Department
U.K. Home Office Drugs Prevention Advisory Service - DPAS
U.K. Health Education Authority
Leeds Addiction Unit - LAU
Department of Addictive Behaviour - St. George's Hospital Medical School, London
European Monitoring Centre for Drugs and Drug Addiction - EMCDDA
Qualitative European Drug Research
Centre for Drug Research, University of Amsterdam - CEDRO
U.S. Office of National Drug Control Policy - ONDCP
U.S. Drug Enforcement Administration Programs - DEA
National Institute on Drug Abuse - NIDA
Substance Abuse and Mental Health Data Archive (SAMHDA)
Substance Abuse and Mental Health Services Administration
(SAMHSA)Indiana Prevention Resource Centre
Australian Centre for Education and Information on Drugs and Alcohol - CEIDA
South African National Council on Alcohol and Drug Dependence - SANCA
Multidisciplinary Association for Psychedelic Studies - MAPS
Lycaeum - an information centre for "visionary" plants, fungi & chemicals