>>13328079i researched this a bit and i'm just going to paste from something i made
So I recently learned about amphetamines' surprising efficacy at treating schizophrenia. This treatment even goes back to 1936 in which it was of value to "incipient dementia praecox of the catatonic type." (
https://jamanetwork.com/journals/archneurpsyc/article-abstract/648803) Surprisingly doesn't induce psychosis much as one would think. Another study which reported significant positivity for schizophrenics had a "relief of complaints in 32 of 48 chronic schizophrenic patients with a long-standing incapacity for work." and 22 of these had "increased work efficiency."
https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1600-0447.1985.tb05066.xEven in schizophrenics already abusing amphetamines it was found to be beneficial "It is argued that benefits may be gained from increased compliance with psychiatric treatment in patients prescribed amphetamine, and that this may outweigh possible risks."
https://pubmed.ncbi.nlm.nih.gov/12503839/As well a 2010 review found "The results indicated a reduction of negative symptoms for people allocated to amphetamines (n = 16, 1 RCT, WMD -3 CI -5.02 to -0.98)."
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD004964/abstractAlthough researched quite little, I have yet to find a negative study for amphetamines and schizophrenia and even found a study that says amphetamine induced psychosis is more a genetic susceptibility thing
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3554477/https://pubmed.ncbi.nlm.nih.gov/31445502/ 
