As we (probably do not) all know LSD inventor Andreas Hofmann was hospitalized when unwittingly experiencing the first acid-trip ever. (He was experimenting with potentially lethal poisons at the time.) Nevertheless he decided to try it again a few days after getting sober. It most likely helped him a lot that the doctor who examined him diagnosed no acute or significant symptoms of poisoning.
So a hospital might indeed be the best place for someone unknowingly intoxicated with hallucigens. Everything is better than staggering around being afraid to have lost one’s mind, I guess.
Edit: I almost forgot about the maybe most important argument for getting medical aid for anyone accidentially drugged with LSD. They will be given a sedative which will instantly interrupt the hallucigen’s effect.
