psychotic reactions

Could you tell me something about psychotic reactions for I think my friend has started behaving weird lately-he actually is thinking that somebody is chasing him and that somebody would like to poisoned him and now it turns out like I don't believe him. The worst thing he actually started being delusional and he is so angry and nervous all the time so do you also think that those might be psychotic reactions and what are the help steps? Thanks!

Sure these are psychotic reactions and those are exactly the same psychotic reactions for which my brother was diagnosed with paranoid schizophrenia a year ago and he is still now on his second Thorazine treatment and it takes about up to 8 weeks to fix this psychotic reactions problem. So you know if he still keeps on having psychotic reactions such like these than it is better have him diagnosed for if psychotic disorders are not recognized and treated on time than someone around could easily end up hurt for you know patients with psychotic reactions in severe stage of their illness may be dangerous.