I'm not aware of a national model. I think most jurisdictions have difficulties with piecemeal-type collection systems. Within the country, I think Alberta and Nova Scotia lead us. Ontario is well behind, but has made an initiative and is starting to collect that information. The next steps are to get all provincial and territorial jurisdictions to collect the information, but then someone has to provide the means to share that across borders.
For example, when I was practising in the emergency department, one of the difficulties we had is we often would get stung or scammed by people who were looking for drugs. A young couple came in. They said they were in that small town to attend a funeral. They had forgotten their prescription and all they wanted was a week's worth of the opiate that they were on, so seven or eight pills. After much discussion, I gave it to them, and off they went.
The next month the RCMP came to my office and said they had done a traffic stop in Alberta because somebody's vehicle had a tail light out. The officer looked in the back seat and saw hundreds and hundreds of empty prescription bottles. This is how the couple made their living, by travelling from coast to coast getting small amounts of opiates and selling them as they went.
There's no way to track that. There's no way from jurisdiction to jurisdiction to track that. If we could, we could make a difference.