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Integrated Dual Diagnosis — MRCPsych Paper B MCQ

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ModerateSubstance MisuseIntegrated Dual DiagnosisMRCPsych Paper B

A 29-year-old man with schizophrenia is receiving care from a community mental health team. He also uses cannabis and alcohol harmfully, but does not require planned detoxification and has no severe alcohol, opioid, benzodiazepine or cocaine dependence. What is the most appropriate standard approach to organising treatment for his coexisting psychosis and substance misuse?

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Correct answer: CProvide coordinated treatment for both conditions within secondary care mental health services

Explanation lettering: C = shown as B · B = shown as C · E = shown as D · D = shown as E

The correct answer is B. NICE recommends that, for most adults with psychosis and coexisting substance misuse, secondary care mental health professionals provide treatment for both conditions. Care should therefore be coordinated rather than restricted to one disorder or divided into disconnected treatment pathways. Specialist substance misuse advice or joint working may be required for severe dependence, difficult-to-control use or substantial associated impairment, but mental health services should continue psychosis treatment and care coordination. Options A and D incorrectly use sequential treatment, which risks leaving one clinically important condition untreated. Option C is inappropriate because substance misuse services should not ordinarily assume sole responsibility for the psychosis. Option E fragments care and conflicts with the requirement for coordinated treatment and an individualised care plan.

Reference: National Institute for Health and Care Excellence. CG120: Coexisting severe mental illness (psychosis) and substance misuse: assessment and management in healthcare settings, recommendations 1.4.5–1.4.7 and 1.4.18–1.4.21. Published 2011; updated May 2024. https://www.nice.org.uk/guidance/cg120/chapter/Recommendations