What makes Tia so addictive?

I have taken lots of opioids, but I’ve never come across anything as addictive as Tia. It seems just from taking a lot on one day I’ve had tremendous trouble cutting back!!! It’s crazy.

And it’s clearly not just the opioid effect; it’s the stimulant too that makes it so addictive. It has a pleasant stimulant effect that doesn’t last very long so you have to re-dose….

But this still doesn’t answer my question on what about Tia makes it so darn addictive!!!