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First trimester pregnancy case of bipolar disorder can we continue quetipine or aripiprazole

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bipolar disorder AND pregnancy AND antipsychotic

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NICE antenatal postnatal mental health antipsychotic pregnancy quetiapine aripiprazole bipolar guidance

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PMID: 39528870

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https://www.nice.org.uk/guidance/cg192/chapter/recommendatio…

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MotherToBaby quetiapine aripiprazole pregnancy birth defects fact sheet

Do not stop either medicine abruptly. In a first-trimester patient with bipolar disorder, continuing an effective antipsychotic is often safer than a medication change or discontinuation that triggers mania, depression, psychosis, poor self-care, or postpartum relapse.

Can they be continued?

  • Quetiapine: Yes, it can be continued when clinically indicated. It has relatively reassuring pregnancy data and is commonly used in bipolar disorder during pregnancy. A key issue is maternal weight gain and gestational diabetes, so monitor weight, diet, and glucose.
  • Aripiprazole: Yes, it can also be continued if it is the medication that keeps the patient stable. Available human data have not shown a clear major birth-defect signal, though its pregnancy evidence base is generally less extensive than for quetiapine. It may reduce milk supply after delivery.
NICE advises that a pregnant woman who is stable on an antipsychotic and likely to relapse without it should generally continue the antipsychotic, with monitoring for excess weight gain and gestational diabetes. See the NICE perinatal mental-health guidance.

Choosing between them

If she is already stable:
  • Prefer continuing the single effective agent at the lowest effective dose.
  • Avoid switching from aripiprazole to quetiapine solely because pregnancy is recognized, unless there is a clear clinical reason. Switching itself can destabilize bipolar illness.
  • If a new medication must be initiated, quetiapine is often a practical first choice because of wider perinatal experience and potential compatibility with breastfeeding.
A 2025 network meta-analysis suggested quetiapine had the lowest estimated teratogenic risk among several commonly used antipsychotics, but this is observational evidence with confounding and should not override an individual patient's prior response. Wang et al., 2025, PMID 39528870. Note that an erratum was subsequently published for this article.

Clinical plan

  1. Urgent joint review by psychiatry/perinatal mental-health service and obstetrics.
  2. Confirm diagnosis, past manic/depressive severity, psychosis, hospitalizations, prior relapses after stopping medication, current dose, adherence, and other drugs.
  3. Continue one agent if stable, unless there is a specific contraindication.
  4. Check baseline and follow-up: weight/BMI, blood pressure, glucose or HbA1c, then gestational-diabetes screening as advised locally. Quetiapine deserves particular metabolic attention.
  5. Make a relapse-prevention plan for pregnancy and especially the first postpartum weeks.
  6. Avoid valproate in pregnancy. Do not add or change mood stabilizers without specialist input.
For patient counseling, MotherToBaby summarizes that studies have not found a higher rate of birth defects with quetiapine or aripiprazole exposure, while emphasizing medication-specific monitoring and the risks of untreated illness.
Bottom line: both quetiapine and aripiprazole may be continued in the first trimester when needed for bipolar stability. If quetiapine is already effective, continuing it is commonly favored; if aripiprazole is uniquely effective and relapse risk is substantial, continuation is usually reasonable rather than an abrupt switch.
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