Well, maybe some opiates do, Demerol is indeed neurotoxic as an example, but natural opiods are usually safe.
I am not a doctor or anything, so if you say that opis do damage liver and brain, I won't say otherwise. But talking from first hand e experience: I am on one or another opiate more than 30 years, as far as my liver goes I sm totally fine after having suffer hepc ( needle induced, not opis). And about my brain....eh.... what were we talking about?? Nah, joking
I will read about it, anyway.
If you fancy you also can see more than one report on 65+ years of addiction individuals that presented no damage at all. Again, nstural opioids. I have posted some reports and sources about the subject before, sorry cause I can't remember tittles now and I don't fancy looking for it now.
Anyway, what I meant was that
@yubacity will be much, much safer on opis than in stims.