having said that, i can go without drinking. you tend to increase consumption in bursts, social events. it can cause a lot of societal problems (ex. south korea/russia) and combined with tobacco (ex. south korea/japan), its right up there in terms of toxicity with combining cocaine and alcohol (dramatically/needlessly increases toxicity).
One might make the same judgement about cocaine hangovers or any substance for that matter.
This is mostly a myth.
You can get at most bars a full meal for around 5$ or sometimes even less. Cocaine isn't very popular with the locals, again especially the younger ones, as it's caused us a lot of societal problems (Stuff like people who don't even touch it ending up tied up in narco violence chiefly... It's just the worst vibes on top of that).
Because of cocaethylene? Can't find anything online that makes it clear what the danger is.
[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3550388/
[2] https://www.cureus.com/articles/73024-cocaethylene-when-coca...