Hi. I was wondering if anyone knew the answer to this. I want to know if fentanyl causes long term brain damage/changes. There's a lot of information out there that says certain opiates such as heroin do with repeated long term use. That is, aquiring permanent changes going beyond normal withdrawal and brain readjustment after you quit. So my question, is fentanyl in the 'permanent changes' category? I know it is a commonly prescribed drug. Does anyone know the answer to this?
