How can we know that a patient’s psychotic symptoms may be substance- or medication-induced?

In another article on this website, we noted that after patients with a diagnosis of a substance-induced psychotic disorder have recovered from that illness, over the next few years, they are at significantly increased risk of being diagnosed with a primary psychotic disorder—either a schizophrenia spectrum disorder or a bipolar disorder (Myran et al., 2023; Rognli et al., 2023;…