Question pretext
We are interested in knowing how patterns of drug use in your area might have changed in the past few years. Firstly, please think about changes in patterns of drug use which have occurred in your area SINCE 2009
Literal question
If you could think and describe in your own words, what, in your opinion, could be the major reasons that may be important for this change (decrease and/or increase) in the use of specific drugs over the last one year in your area? Ask probing questions [List drug type and write additional reasons]