Got it.
Well, there are pieces and there are shavings, right? Because I cut them first with the pill cutter and then I file down.
If the pieces are big enough, I might reuse them. But the shavings go straight into the trash.
Trash is best b/c it's not safe for the water system to flush drugs (even though people talk about "flushing their benzos" as a victory lap all the time, it's safest to just throw them out). A pharmacy can also safely dispose of them.
Hope that helps!