Paliperidone. In animal studies, there were no increases in fetal abnormalities when pregnant rats and rabbits were treated with up to 8 times the maximum recommended human dose of paliperidone during the period of organogenesis.33
A single case report34 measured levels of risperidone and its 9-hydroxy metabolite, paliperidone, in the breast milk of a mother who had taken risperidone during pregnancy and in the serum of her child. 9-OH-risperidone dose in breast milk was calculated as 4.7% of the weight-adjusted maternal dose, and serum levels in the infant were undetectable. No ill effects on the child were observed.
It is not possible to draw solid conclusions about atypical antipsychotics’ potential effects on human development from animal studies. Because of the lack of human data for the newer atypical antipsychotics—asenapine, iloperidone, lurasidone, paliperidone—in general these agents would not be advisable as first-line medications for treating pregnant women.
A few caveats
All atypical antipsychotics share the propensity to trigger or worsen glucose intolerance, which can have significant negative consequences in a pregnant patient. When deciding to use an atypical antipsychotic during pregnancy, blood glucose should be monitored carefully and regularly.
Because all atypical antipsychotics (except clozapine) are FDA pregnancy class C—indicating that animal reproduction studies have shown an adverse effect on the fetus and there are no adequate and well-controlled studies in humans, but potential benefits may warrant use of the drug in pregnant women despite potential risks—the decision to use these medications must be based on an individualized assessment of risks and benefits. Patients and their providers together should make a fully informed decision.
There is an urgent need for larger and better-designed investigations that will be sufficiently powered to detect differences in outcomes—particularly major malformations, preterm delivery, adverse events in labor and delivery, metabolic and anthropometric effects on the newborn, and neurodevelopmental and psychiatric outcomes for individuals exposed in utero—between women without mental illness, untreated women with mental illness, and women receiving atypical antipsychotics during pregnancy. Further research into the pharmacokinetics and clinical efficacy of antipsychotics in pregnant women also would be useful. Clinicians can assist with these efforts by submitting their patient data to a pregnancy registry maintained by the Massachusetts General Hospital (see Related Resources).
Bottom Line
Treatment with atypical antipsychotics during pregnancy may increase the risk of adverse birth outcomes, but inadequately controlled mental illness also carries some degree of risk. The decision to use any atypical antipsychotic during pregnancy must be based on an individualized assessment of risks and benefits and made by the pregnant patient and her provider.
Related Resources
- Gentile S. Antipsychotic therapy during early and late pregnancy. A systematic review. Schizophr Bull. 2010;36(3):518-544. www.ncbi.nlm.nih.gov/pmc/articles/PMC2879689.
- Massachusetts General Hospital National Pregnancy Registry for Atypical Antipsychotics. www.womensmentalhealth.org/clinical-and-research-programs/pregnancyregistry.
Drug Brand Names
Aripiprazole • Abilify Olanzapine • Zyprexa
Asenapine • Saphris Paliperidone • Invega
Clozapine • Clozaril Quetiapine • Seroquel
Haloperidol • Haldol Risperidone • Risperdal
Iloperidone • Fanapt Ziprasidone • Geodon
Lurasidone • Latuda
Disclosures
The authors report no financial relationships with any company whose products are mentioned in this article or with manufacturers of competing products.