So, I only used Phenibut for 2 months or so. Felt myself getting more and more addicted to it, thinking "well 2 days a week? I'll take it Sunday and then Tuesday and then Friday since Sunday is the weekend" type of shit. Honestly, I'm not really sure how or why but one day I just didn't like how it felt, thank fucking God. Because I was taking a fucking lot of that shit. Not enough to end up in withdrawal.
Psychosis is definitely a risk factor in withdrawal for many, many drugs. I just had a bit of a psychotic break weeks back. It was bad enough someone tried to rob me, but then I ran out of Valium for a week and was having terrifying withdrawals. So terrifying I won't even speak further.
Kratom I've experienced psychosis in withdrawal. Severe detachment from reality and myself (DP/DR). It did not help that I was going through a severe personal crisis at the time, both in my identity, and the loss of someone very close to me. It's haunting to look back. Everything was cold, I felt only sadness and emptiness. I wasn't there anymore. Next day, I'm cutting bags open to lick all the shit lol... Actually it worked, too.
I mean, it's not severe with kratom, compared to the tons of drugs that are far worse. The withdrawals truly suck ass, but benzo withdrawal freaked me out way more. Although, I've basically been using kratom daily for almost... 8 years??? I've only been in withdrawal twice... No idea how bad they'd be now.
Anyway, I know Phenibut is really addictive. So yeah, you'd absolutely go through some psychosis. If benzos can do that, this shit would be next level. Be careful man, and maybe try some kava kava. Actually, I believe that's what got me off Phenibut. It kind of felt similar, but cleaner (minus the fact that it tastes like feet). Haven't had that stuff in awhile.