Hmm...thorazine is nasty, but in circumstances where someone was having a total psychotic breakdown at the end of a 3-day speed binge, or flipping out on a psychedelic, it might save them 48-96 sleepless hours of schizophrenic hell. Seroquel would probably be safer, though: and I wouldn't mind having a few tabs of quetiapine around, as I'm tapering off diaz and getting very little sleep. 100 mgs of seroquel once or twice a week to make up the deficit is something I'd love to be prescribed, but my doc would never go for it, and I don't want to push my luck, as he's giving me enough diaz to taper slowly and safely - hopefully I won't fuck up this time. Anti-psychotics are horrible when used long-term, but in dealing with drug psychosis and total nightmare trips, thorazine might,as a one-off, save someone a lot of pain and paranoia. But there are lots of gentler APs - Risperidone's another one that leaps to mind.
I know some people hate seroquel, and I'd never use it often, but Suzy Q has her charms, and she's used in treatment of both psychosis and bi-polar disorder.