@RenewedRebecca In terms of hemlock, apparently there’s no intoxication: just a horrible death as you lose the ability to breathe, but remain fully aware (it’s a neurotoxin).
Solanine, it seems can cause hallucinations, but only once you are deep into “oh shit, I’m going to die” territory, and apparently you have to get there via nausea, diarrhoea, muscle cramps, and a whole lot of other fun stuff.
The latter is one of my main IBS triggers, so I eat potatoes very sparingly.