Psych CASC / OSCE · Psychopharmacology — pregnancy and lactation
Counselling psychotropics in an unplanned pregnancy (CASC)
CASC-style station: shared decision on perinatal psychopharmacology — untreated illness risk, valproate switch hierarchy, lithium absolute-risk framing, and safety-net with obstetrics.
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Target exams
Station instructions (candidate)
You have 7 minutes. Explore understanding and fear without dismissing it. Explain why stopping everything today is not automatic. Name that valproate is the agent of greatest concern for major malformations and learning/developmental outcomes and outline a switch plan. Frame lithium with modern small absolute cardiac risk language if relevant to her history. Include postpartum risk, obstetric liaison, and a clear safety-net. Do not guarantee zero risk from any option.[1][2][4]
Marking domains
Agenda and empathy; accurate untreated bipolar/postpartum risk framing; correct valproate hierarchy (MCM + neurodevelopment); modern lithium absolute-risk counselling if discussed; shared decision without coercion; obstetric/perinatal psychiatry plan; crisis and early follow-up safety-net; invitation for partner questions. These domains match CASC priorities for perinatal medication stations.[1][2][3][5]
Model communication map
- Open: congratulate carefully; check dates, supports, and what they read online; name the shared goal — keep mother well and protect baby as much as evidence allows.[6]
- Illness first: bipolar can return if medicines stop suddenly; pregnancy does not protect; the weeks after birth are especially high risk for severe episodes.[1][5]
- Baseline risk: any pregnancy has roughly a 2–3% chance of a major birth difference without medicines — context for numbers.[4]
- Valproate truth: among mood medicines, valproate has the highest known risk of major birth defects and of effects on learning/development in children exposed in the womb — we plan to change off valproate urgently with specialist support, not continue it casually.[2][3]
- Lithium if offered: modern large studies show a small increase in heart differences, not the nightmare percentages of old stories; if lithium fits her history we use scans, blood levels, and a birth plan — a joint decision.[4]
- Today’s actions: obstetric confirmation, stop-switch plan written, who to call if mood rises or sleep collapses, early review, written information.[6]
- Close: partner questions; no guarantee of zero risk; no abandonment — we walk the pregnancy with them.[6]
Common fails
- Agreeing to stop all medicines the same day without relapse framing.[1]
- Minimising valproate risk or treating it as interchangeable with lithium.[2][3]
- Calling lithium “poison” or “completely safe.”[4]
- Ignoring postpartum peak risk.[5]
- No obstetric liaison or follow-up plan.[6]
References
- [1]Viguera AC, Whitfield T, Baldessarini RJ, et al. Risk of recurrence in women with bipolar disorder during pregnancy: prospective study of mood stabilizer discontinuation Am J Psychiatry, 2007.PMID 18056236
- [2]Tomson T, Battino D, Bonizzoni E, et al. Dose-dependent risk of malformations with antiepileptic drugs: an analysis of data from the EURAP epilepsy and pregnancy registry Lancet Neurol, 2011.PMID 21652013
- [3]Meador KJ, Baker GA, Browning N, et al. Cognitive function at 3 years of age after fetal exposure to antiepileptic drugs N Engl J Med, 2009.PMID 19369666
- [4]Patorno E, Huybrechts KF, Bateman BT, et al. Lithium Use in Pregnancy and the Risk of Cardiac Malformations N Engl J Med, 2017.PMID 28591541
- [5]Bergink V, Rasgon N, Wisner KL Postpartum Psychosis: Madness, Mania, and Melancholia in Motherhood Am J Psychiatry, 2016.PMID 27609245
- [6]Betcher HK, Wisner KL Psychotropic Treatment During Pregnancy: Research Synthesis and Clinical Care Principles J Womens Health (Larchmt), 2020.PMID 31800350