What drugs do people take and how often? Where do they buy them? What were the consequences for their health?
These were some of the questions asked by the Global Drug Survey (in partnership with the Guardian and Mixmag), which asked 800,000 drug users from 43 countries around the world about their drug use - from cocaine and cannabis to MDMA and alcohol.
The key findings of the survey and the full data from it are available to read here.
From 4-5pm (BST) Dr Adam Winstock, managing director and founder of Global Drug Survey, will be online to take your questions about the survey. HE trained as both a physician and psychiatrist and has worked in the UK and Australia. He is currently a consultant psychiatrist, addiction medicine specialist and researcher based in London.
First up, we have a question about the survey's aims:
Ukslimer asks:
Shawad asks:
And if you're a German-speaker interested in what Zeit Online made of the survey, you can read their coverage here.
Our next question deals with the politics of drugs:
Toby Shew asks:
This question comes from darylrevok:
Leave your questions in the comments thread below.
Interesting research, but I wanted to know what you're hoping to achieve with your findings? Is your aim to create a better perspective on drug prohibition and perception?