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Psych CASC / OSCEAddiction psychiatry

Psych CASC / OSCE · Addiction psychiatry

Explaining anti-craving medicines after detox — CASC communication station

MRCPsych/FRANZCP-style communication station: explain naltrexone, acamprosate, and disulfiram in plain language with doses and safety gates; address opioids, liver concerns, disulfiram alcohol education, COMBINE-level honesty about expectations, and psychosocial aftercare.

communication
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Target exams

FRANZCPMRCPsychABPNMD-DNB

Target exams

FRANZCPMRCPsychABPNMD-DNB
Prompt
A 42-year-old woman completed medical alcohol detox two days ago. She is oriented and anxious. Her partner is present. They have heard of 'Antabuse', 'the monthly injection', and 'three tablets a day' from online forums. She still has oxycodone at home from dental pain last month (last tablet five days ago). She wants something that 'cures craving forever' and fears liver damage because a relative had cirrhosis. She asks whether she can drink 'a little champagne at a wedding next month if she skips the tablet that day'.

Station brief

Format. Communication station, approximately 7–10 minutes after reading time. You are the psychiatry registrar in the post-detox clinic. [5]

Candidate instructions. Explain that medicines reduce risk of relapse but are not a permanent cure; outline naltrexone, acamprosate, and disulfiram in plain language with key doses and safety points; address leftover opioids before naltrexone; address liver monitoring without catastrophising mild risk; correct the 'skip tablet then drink' plan for disulfiram; emphasise counselling/psychosocial care; shared decision and follow-up. [1][2][3]

Candidate scenario

Patient: “Just give me the strongest one.” Partner: “If she drinks champagne once, will her heart stop?” Oxycodone bottle is still in her handbag. [1][5]

Marking domains

  • Empathy, non-stigmatising language, agenda setting
  • Accurate phase-of-care explanation (detox done; now relapse prevention)
  • Naltrexone: often one 50 mg tablet daily; not while opioids remain; LFT monitoring explained calmly
  • Acamprosate: typically 666 mg three times daily; kidney check; helps stay off alcohol after detox
  • Disulfiram: supervised; reaction if alcohol drunk; not for planned wedding sips; education about hidden alcohol
  • Honest expectations (helps many people, not magic cure); psychosocial care essential
  • Shared decision, teach-back, follow-up and crisis plan
[1] [2] [3] [4] [5]
Reveal assessor key

Open. Introduce role; acknowledge anxiety about craving and liver; involve partner with consent. [5]

Frame medicines. After detox, tablets or monthly injections can make relapse less likely by reducing the reward of drinking (naltrexone), supporting the brain’s balance in early sobriety (acamprosate), or causing a strong unpleasant reaction if alcohol is drunk (disulfiram). None is a forever cure; all work best with talking therapies and support.[1][2][4]

Opioid gate. Leftover oxycodone must be disposed/planned carefully; naltrexone must not start until opioids are fully stopped for a safe interval — otherwise severe withdrawal and pain medicines will not work as expected. Offer medical alert advice.[1]

Doses in plain language. Naltrexone often one 50 mg tablet daily (or monthly injection where available); acamprosate often 666 mg three times a day after kidney check; disulfiram often 200–250 mg daily only if she and a supervisor understand the alcohol reaction rules.[1][2][3]

Wedding / skip-dose myth. Skipping disulfiram to drink is unsafe and defeats the treatment contract; even small alcohol exposures can trigger reactions. If she is not ready for that commitment, choose another medicine.[3]

Liver. We check blood tests and avoid careless starts in severe liver failure; many people with milder enzyme changes still use medicines with monitoring — individualise.[1][5]

Close. Agree preferred option after opioid clearance; book early review; written information; partner supervision plan if disulfiram chosen; crisis contacts. Teach-back. [1][5]

References

  1. [1]Reus VI, Fochtmann LJ, Bukstein O, et al. The American Psychiatric Association Practice Guideline for the Pharmacological Treatment of Patients With Alcohol Use Disorder Am J Psychiatry, 2018.PMID 29301420
  2. [2]Jonas DE, Amick HR, Feltner C, et al. Pharmacotherapy for adults with alcohol use disorders in outpatient settings: a systematic review and meta-analysis JAMA, 2014.PMID 24825644
  3. [3]Fuller RK, Gordis E Does disulfiram have a role in alcoholism treatment today? Addiction, 2004.PMID 14678055
  4. [4]Anton RF, O'Malley SS, Ciraulo DA, et al. Combined pharmacotherapies and behavioral interventions for alcohol dependence: the COMBINE study: a randomized controlled trial JAMA, 2006.PMID 16670409
  5. [5]Connor JP, Haber PS, Hall WD Alcohol use disorders Lancet, 2016.PMID 26343838