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Brexpiprazole use while Breastfeeding

Medically reviewed by Last updated on Jan 13, 2023.

Drugs containing Brexpiprazole: Rexulti

Brexpiprazole Levels and Effects while Breastfeeding

Summary of Use during Lactation

No information is available on the excretion of brexpiprazole in breastmilk. A single case report implicated brexpiprazole as a cause of decreased lactation. Until more data are available, an alternate drug may be preferred.

Drug Levels

Maternal Levels. Relevant published information was not found as of the revision date.

Infant Levels. Relevant published information was not found as of the revision date.

Effects in Breastfed Infants

Relevant published information was not found as of the revision date.

Effects on Lactation and Breastmilk

A woman was taking brexpiprazole 2 mg daily during the third trimester of pregnancy for bipolar disorder. Her newborn infant was hospitalized in the NICU for hypoxic ischemic encephalopathy for 18 days. While her infant was in the NICU, she reduced her brexpiprazole dose to 2 mg every 2 days because of a shortage of medication. The mother, who had successfully breastfed 2 previous infants, pumped milk 10 times daily and was able to pump 120 mL daily by one week postpartum. After her infant was discharged, she increased the dose back to 2 mg daily. At a follow-up clinic visit, she could only pump 30 mL daily. She then stopped brexpiprazole and began a short course of metoclopramide. Within 10 days of stopping brexpiprazole, her milk supply increased, and she could almost exclusively breastfeed her infant who gained weight normally. Her serum prolactin level also increased to normal.[1]

Alternate Drugs to Consider

Haloperidol, Olanzapine, Quetiapine, Risperidone


Berlin S, Bodnar K. Low breast milk production associated with brexipiprazole (Rexulti). Breastfeed Med 2020;15:A-3. Abstract. doi: 10.1089/bfm.2020.29162.abstracts. [CrossRef]

Substance Identification

Substance Name


CAS Registry Number


Drug Class

Breast Feeding


Antipsychotic Agents

Serotonin Agents

Dopamine Agonists

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Further information

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