Schizophrenia is a psychotic disorder that can show up as persistent delusions (e.g., believing you’re famous), hallucinations (e.g., hearing voices that aren’t there), incoherent speech, chaotic behavior, and a lack of emotional expression. While schizophrenia is commonly co-diagnosed with substance use disorders, it can be hard to tease apart the symptoms, particularly if a person is experiencing drug-induced psychosis. Substance use can worsen the symptoms of schizophrenia and greatly impact a person’s capacity for treatment.