Pharmacotherapy profile for mothers with schizophrenia and bipolar affective disorder in a psychiatric mother–baby unit

Background

Pharmacotherapy treatment is used to manage women with schizophrenia and bipolar affective disorder admitted to a mother–baby unit (MBU).

Aim

The aims of this study were (1) to examine prescribing practices for women with schizophrenia and bipolar affective disorder in an MBU, (2) to assess alignment with the Mental health care in the perinatal period: Australian clinical practice guideline and (3) to examine the classes of typical and atypical antipsychotics prescribed to mothers with schizophrenia.

Method

A retrospective audit of women with schizophrenia and bipolar affective disorder admitted to a psychiatric MBU, located in Queensland, Australia, was conducted from March 2017–July 2019. The exclusion criteria included women admitted with depression, anxiety, personality disorders, and postpartum psychosis. Pharmacotherapy treatment details were extracted at commencement of admission, mid-way through admission, and discharge. Descriptive statistics were completed. This project was exempt due to the local policy requirements that constitute research by the Gold Coast Hospital and Health Service Human Research Ethics Committee (Reference no: EX/2023/QGC/102306). The justification for this exemption was as follows: the study was deemed a quality improvement activity and complied with Chapter 2.3 of the National Statement of Ethical Conduct in Research and involved only routinely collected data.

Results

Of the 53 mothers included in the study, 29 (55%) had schizophrenia and 24 (45%) had bipolar affective disorder. In addition, 97% of women with schizophrenia received atypical antipsychotics. Five women (21%) with bipolar affective disorder (mean age = 31.60 years, standard deviation = 6.19 years) were prescribed sodium valproate, with four women given contraception. Sodium valproate or lamotrigine were prescribed to four women (67%) with bipolar affective disorder whilst breastfeeding. Of mothers prescribed lithium, 92% did not breastfeed. Overall, 44% of women involuntarily admitted received antipsychotic depot medication compared with 38% of voluntary patients. Results are discussed in relation to the national guidelines.

Conclusion

This is the first naturalistic study to examine the pharmacotherapy management of postpartum women admitted to a psychiatric MBU with schizophrenia and bipolar affective disorder. The study highlights that prescribing patterns across three time points during admission were generally in alignment with Australian national guidelines.