Experts addressed the security and organised crime implications, the effectiveness of supply-side policies, as well as mass incarceration and public health.
Professor Jeffrey Lazarus talks about the challenges we face to combat hepatitis in Europe and he calls on the community to share wisdom and experience.
In his speech, President Obasanjo called for the decriminalisation of people who use drugs and the need to ensure better access to harm reduction and treatment.
California legalised medical marijuana in 1996, and in this November, Alaska, Oregon and the District of Columbia will decide whether they should follow the drug policies in Washington State and Colorado - to legalise recreational marijuana.
The National Human Rights Commission plans to pursue a crimes against humanity case against ex-premier Thaksin Shinawatra in connection with his government's war on drugs 11 years ago, in which more than 2,500 drug suspects were killed.
