Psych CASC / OSCE · Psychopharmacology — antidepressants
Explaining antidepressant start, side-effects and review plan (CASC)
CASC-style communication station: shared decision on starting an SSRI/SNRI, early monitoring, sexual SE, suicide risk framing, and STAR*D-informed next steps if nonresponse.
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Target exams
Station instructions (candidate)
You have 7 minutes. Explain recommended antidepressant treatment for moderate-severe unipolar depression to the patient and partner. Cover expected benefits and time course, common side-effects including sexual dysfunction, early suicide-risk monitoring without scaremongering, addiction myths, and what happens if the first medicine is not enough. Avoid jargon without explanation. Do not guarantee cure. Anchor in evidence-informed stepped care.[1][6]
Marking domains
Mark empathy and agenda setting; accurate plain-language mechanism (monoamine modulation helping mood circuits, not a “personality drug”); honest sexual side-effect discussion grounded in high real-world rates; early review plan for activation/suicidality; clear follow-up and safety-net; STAR*D-style message that many people need a second step and that is not personal failure; no over-promise and no stigma.[2][3][4]
Model communication map
- Open: thank them; check what they have read; name shared goals (sleep, energy, hope, work/relationships).[6]
- Medicine role: reduces depressive syndrome intensity for many people; works best with psychological and social supports, not instead of them. Network evidence supports antidepressants as a class over placebo in adult MDD.[1]
- Choice example: e.g. sertraline starting 50 mg orally daily, with a plan to review and titrate; explain why this agent fits anxiety-depression overlap if relevant.[1][6]
- Time course: some sleep/anxiety change earlier; mood often needs weeks; full trial typically several weeks at an adequate dose before judging failure.[2]
- Sexual SE: common with many serotonergic medicines — we will ask proactively; options include dose adjust, switch, or different class if needed.[3]
- Suicide risk framing: untreated depression raises risk; early weeks after starting need closer contact because a minority experience worsening ideation or agitation — safety plan, crisis contacts, earlier review if worse.[4]
- Addiction myth: not recreationally addictive like opioids; stopping should be planned because of discontinuation symptoms and relapse risk; continuation after improvement prevents relapse for many.[5]
- If first fails: many people need a second step (switch or add-on) — sequential care is normal science, not blame.[2]
- Close: questions, written info, who to call tonight if suicidal thoughts escalate.[6]
Common fails
- Promising zero side-effects or “you will feel normal in 48 hours.”
- Dismissing sexual dysfunction despite high documented incidence.[3]
- Either terrorising about black-box warnings or ignoring early monitoring needs.[4]
- Framing switch after nonresponse as rare catastrophe rather than expected sequential care.[2]
- Calling antidepressants “addictive” without distinguishing discontinuation from substance dependence.[5]
References
- [1]Cipriani A, Furukawa TA, Salanti G, et al. Comparative efficacy and acceptability of 21 antidepressant drugs for the acute treatment of adults with major depressive disorder: a systematic review and network meta-analysis Lancet, 2018.PMID 29477251
- [2]Rush AJ, Trivedi MH, Wisniewski SR, et al. Acute and longer-term outcomes in depressed outpatients requiring one or several treatment steps: a STAR*D report Am J Psychiatry, 2006.PMID 17074942
- [3]Montejo AL, Llorca G, Izquierdo JA, et al. Incidence of sexual dysfunction associated with antidepressant agents: a prospective multicenter study of 1022 outpatients J Clin Psychiatry, 2001.PMID 11229449
- [4]Stone M, Laughren T, Jones ML, et al. Risk of suicidality in clinical trials of antidepressants in adults: analysis of proprietary data submitted to US Food and Drug Administration BMJ, 2009.PMID 19671933
- [5]Geddes JR, Carney SM, Davies C, et al. Relapse prevention with antidepressant drug treatment in depressive disorders: a systematic review Lancet, 2003.PMID 12606176
- [6]Malhi GS, Bell E, Bassett D, et al. The 2020 Royal Australian and New Zealand College of Psychiatrists clinical practice guidelines for mood disorders Aust N Z J Psychiatry, 2021.PMID 33353391