Psych CASC / OSCE · Psychopharmacology — valproate
Explaining valproate avoidance and alternatives after mania (CASC)
CASC-style station: correct an inappropriate valproate start, explain teratogenicity hierarchy and BALANCE limits, outline safer alternatives and monitoring if any short bridge continues, and safety-net for confusion/ammonia.
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Station instructions (candidate)
You have 7 minutes. Explain why overnight valproate is not appropriate long-term given her pregnancy plans, correct the “stronger than lithium for staying well” myth using BALANCE, outline safer maintenance options, cover contraception now, and safety-net for concerning symptoms including confusion (ammonia pathway). Acknowledge that valproate can treat mania in the right patient without endorsing it for her. Do not frighten; do not minimise teratogenicity.[1][2][3]
References6ShowHide
- [1]Geddes JR, Goodwin GM, Rendell J, et al. Lithium plus valproate combination therapy versus monotherapy for relapse prevention in bipolar I disorder (BALANCE): a randomised open-label trial Lancet, 2010.PMID 20092882
- [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]Christensen J, Grønborg TK, Sørensen MJ, et al. Prenatal valproate exposure and risk of autism spectrum disorders and childhood autism JAMA, 2013.PMID 23613074
- [5]Bowden CL, Brugger AM, Swann AC, et al. Efficacy of divalproex vs lithium and placebo in the treatment of mania. The Depakote Mania Study Group JAMA, 1994.PMID 8120960
- [6]Segura-Bruna N, Rodriguez-Campello A, Puente V, et al. Valproate-induced hyperammonemic encephalopathy Acta Neurol Scand, 2006.PMID 16774619