Last time I was prescribed opiates, I got a standard prescription. There were about 20 pills, inside a box. The box had 20 bubbles, each with one pill in it.
Unsure of how long the pain would last, this worked. I was able to sleep a few nights and work out the pain since I had a few things to do. I had an xray planned just in case, but it wound up being necessary.
I don't see the point of taking more pills than I have needed, so they are in the cabinet. I also don't see the point of breaking up a bubble package at the pharmacy. They are made to both keep costs down and ensure pill safety. No pill miscounts, for example. Bubble packs have shown to help slow down suicides as well (people have to work harder to get the pills out, giving them time to rethink things at the last minute). I don't have a history of asking for pain medicine.
The time before this was for gall bladder surgery some years ago. As soon as I didn't need the pills, I stopped taking them. This was in the US, so they were loose pills, but I*m not sure they numbered more. I did need one later when I returned to work as the first day was rough. I assume the prescription I received was standard procedure after the operation. Just because I didn't need that many doesn't mean that someone else didn't.