Which disorder commonly co-occurs with schizophrenia?

Substance use disorder frequently co-occurs with schizophrenia, making it the correct answer. Research indicates that individuals diagnosed with schizophrenia are at a higher risk for developing substance use disorders, particularly involving alcohol and illicit drugs. This co-occurrence may be attributed to various factors, including the use of substances as a form of self-medication to alleviate symptoms of the disorder, such as auditory hallucinations or severe anxiety. The interaction between the two can complicate treatment.

While other disorders like anxiety disorders or bipolar disorder can co-occur, the prevalence and impact of substance use disorders in individuals with schizophrenia are more pronounced. Anxiety disorders may be present in some individuals with schizophrenia but do not show the same level of co-occurrence as substance use disorders. Similarly, although bipolar disorder has overlapping features and may be confused with schizophrenia in certain cases, it is not as commonly co-occurring as substance use disorders in the schizophrenia population. Obsessive-compulsive disorder also can occur alongside schizophrenia, but again, it does not match the frequency of substance use disorders. Thus, the relationship between schizophrenia and substance use disorders is well-documented and significant, underscoring the importance of addressing substance use in individuals diagnosed with schizophrenia.