Psych CASC / OSCE · General adult psychiatry — substance/medication-induced psychosis
Explain substance-induced psychosis and follow-up to parents — CASC communication station
MRCPsych/FRANZCP-style communication station: explain SIP timeline diagnosis, acute treatment, conversion risk without fatalism, dual follow-up, and non-moralising cannabis counselling.
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Station brief
Format. Communication station, approximately 7–10 minutes active time after reading. You are the psychiatry registrar on the early intervention / acute ward. [1]
Candidate instructions. Explain the working diagnosis of substance-induced (cannabis-associated) psychosis to the parents, outline medical checks and why an antipsychotic may be used, discuss the importance of cannabis cessation, address the risk of later primary psychotic illness honestly without catastrophic fatalism, and describe the follow-up plan. Check understanding. The examiner plays both parents. [1]
References3ShowHide
- [1]Starzer MSK, Nordentoft M, Hjorthøj C Rates and Predictors of Conversion to Schizophrenia or Bipolar Disorder Following Substance-Induced Psychosis Am J Psychiatry, 2018.PMID 29179576
- [2]Murrie B, Lappin J, Large M, et al. Transition of Substance-Induced, Brief, and Atypical Psychoses to Schizophrenia: A Systematic Review and Meta-analysis Schizophr Bull, 2020.PMID 31618428
- [3]Schoeler T, Petros N, Di Forti M, et al. Effects of continuation, frequency, and type of cannabis use on relapse in the first 2 years after onset of psychosis: an observational study Lancet Psychiatry, 2016.PMID 27567467