Brief intervention reduces prescription of sodium valproate in women of childbearing age.

OBJECTIVE: Sodium valproate's teratogenicity has prompted increasing restrictions to its use. Our initial audit 2 years prior demonstrated continuing hazardous prescription to women of childbearing age in a New Zealand psychiatric inpatient unit, consistent with nationwide dispensing data. METHOD: Following a service-wide educational intervention and application of "black box" warnings, we conducted a follow-up audit of valproate prescription in the same inpatient unit by reviewing records of women admitted over a 10-month period (March 2020-January 2021). Results were compared with local and international guidelines, and against data from our initial audit. RESULTS: Two hundred and sixty-one women of childbearing age were admitted over the sampling period, 26 of whom (10%) were prescribed valproate on discharge. Over three quarters (77%) of these patients had diagnoses other than bipolar affective disorder, valproates only approved psychiatric indication in New Zealand. Following intervention, significant improvements were observed in several key indicators of prescribing quality: pregnancy testing, documentation of contraception status, and discussion of teratogenic risk. CONCLUSIONS: Following intervention, re-audit demonstrated reduced prescription of valproate and improved management of its teratogenic risk in women of childbearing age receiving inpatient psychiatric care. These results demonstrate the value of a systematic approach to improve prescribing practice.

Sodium valproate prescription to women of childbearing age in a New Zealand inpatient psychiatric unit.

OBJECTIVE: Sodium valproate's teratogenicity has prompted increasing restriction in its use. It is still widely prescribed to women of childbearing age in New Zealand. To examine this problem, we audited the prescribing pattern of sodium valproate in a psychiatric inpatient unit in New Zealand. METHOD: We reviewed the clinical records of women admitted over a 2-year period (2016-2018). Results were analysed and compared with local and international guidelines. RESULTS: Five hundred and thirty-four women of child-bearing age were admitted over the sampling period, 96 of whom (18%) were prescribed valproate on discharge. Half of these patients had diagnoses other than bipolar affective disorder, valproate's only approved psychiatric indication in New Zealand. Pregnancy testing and contraception status were documented in a minority (29 and 10 cases, respectively). Teratogenic risk discussion was documented in only 11 cases. CONCLUSIONS: Prescription of valproate to women of childbearing age in our sample currently falls well short of best practice. Urgent action at both clinician and organisational levels is required to address this risk.