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Файл:Ординатура / Хирургия / Библиотека им академика М.И. Перельмана / Книга_5238_Библиотеки_им_академика_М_И_Перельмана.pdf
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- •Contents
- •1.1 Introduction
- •1.2.1 Antidepressants
- •1.2.3.2 Second-Generation Antipsychotics (SGAs)
- •1.2.4 Mood Stabilizers
- •1.2.5 Stimulants
- •1.3 Conclusion
- •References
- •1.2.1.1 Selective Serotonin Reuptake Inhibitors
- •1.2.1.2 Bupropion
- •1.2.1.3 Other Less Commonly Used Antidepressants
- •1.2.2 Anxiolytics
- •1.2.3 Antipsychotics
- •1.2.3.1 First Generation Antipsychotics (FGAs)
- •2.2.8 Opioid Pharmacokinetics During Lactation
- •2.3 Conclusions
- •References
- •3.1 Introduction
- •3.2 Pregnancy Risk Categories
- •3.4.1.4 Monotherapy Versus Polytherapy
- •3.4.2.1 Experimental Studies
- •Animal Studies
- •3.4.2.2 Human Studies
- •Case Reports
- •Epidemiologic Studies
- •Meta-Analysis
- •3.4.2.3 Methodological Issues
- •Sample Size, Characteristics, Follow-Up
- •Recall Bias
- •Confounders
- •Confounding by Indication
- •Meta-Analysis
- •3.5 Lactation
- •3.5.1.4 Lipid Solubility
- •3.5.1.5 Pharmacogenomics
- •3.5.1.6 Oral Bioavailability
- •3.5.3.1 Milk Plasma Ratio (M/P Ratio)
- •3.5.3.2 Relative Infant Dose
- •3.5.3.3 Infant Plasma Concentration
- •3.5.3.5 Lactation Categories
- •3.7 Conclusion
- •References
- •4.1 Introduction
- •4.5 Conclusions
- •References
- •5.1 Introduction
- •5.2 Paternal Mental Health
- •5.2.1 Paternal Mental Health: Depressive Disorders
- •5.2.2 Paternal Mental Health: Anxiety Disorders
- •5.2.3 Paternal Mental Health: Bipolar Disorders
- •5.2.4 Paternal Mental Health: Posttraumatic Stress Disorders
- •5.2.5 Paternal Mental Health: Obsessive-Compulsive Disorders
- •5.2.6 Paternal Mental Health: Substance Use Disorders
- •5.4 Management Strategies
- •5.5 Conclusions
- •References
- •6.1 Introduction
- •6.5.1.1 Congenital Malformations
- •6.5.1.2 Preterm Birth
- •6.5.1.3 Low Birth Weight
- •6.5.1.4 Stillbirth
- •6.5.1.5 Low APGAR Scores
- •6.5.1.7 Neonatal Adaptation Syndrome
- •6.5.2.2 Neurodevelopmental Disorders
- •6.5.3 Maternal Outcomes
- •6.5.3.1 Postpartum Hemorrhage
- •6.5.3.2 Eclampsia, Hypertension
- •6.6.1 SSRIs
- •6.6.1.1 Sertraline
- •6.6.1.2 Paroxetine
- •6.6.1.3 Fluoxetine
- •6.6.1.5 Fluvoxamine
- •6.6.2 SNRIs
- •6.6.2.1 Duloxetine
- •6.6.2.2 Venlafaxine
- •6.6.3 TCAs
- •6.6.4 Atypical/Other Antidepressants
- •6.6.4.1 Vortioxetine
- •6.6.4.2 Bupropion
- •6.6.4.3 Mirtazapine
- •6.7 Statistical Significance Versus Clinical Significance
- •6.8 Conclusion
- •References
- •7: Antidepressants During Lactation
- •7.1 Introduction
- •7.2.2 Discussion
- •7.3.1 The Safety Scoring System
- •7.3.2 Methods
- •7.3.3 Safety Scores
- •7.3.3.1 Selective Serotonin Reuptake Inhibitors (SSRIs)
- •7.3.3.3 Tricyclic Antidepressants (TCAs)
- •7.3.3.4 Other Antidepressant Drugs
- •7.3.3.5 Neurosteroids Antidepressants
- •7.3.4 Discussion
- •7.4 General Discussion
- •7.5 Conclusion
- •Bibliography
- •8.1 Introduction
- •8.6 Gestational Diabetes
- •8.9.8 Special Cases
- •8.9.8.1 Risperidone
- •8.9.8.2 Aripiprazole
- •8.9.8.3 Clozapine
- •8.9.8.4 Olanzapine
- •8.11 Premature Infants/Low Birth Weight Infants
- •8.13.1 Definitions
- •8.15 Conclusion
- •References
- •Suggested Reading
- •9: Antipsychotics During Lactation
- •9.1 Introduction
- •9.3.2 Medication Risk Category Classifications
- •9.4 First-Generation Antipsychotics (FGAs)
- •9.4.1 Haloperidol
- •9.4.2 Chlorpromazine
- •9.5 Second-Generation Antipsychotics (SGAs)
- •9.5.1 Olanzapine
- •9.5.3 Quetiapine
- •9.5.4 Aripiprazole
- •9.5.5 Clozapine
- •9.5.6 Amisulpride
- •9.5.7 Ziprasidone
- •9.5.8 Newer Second-Generation Antipsychotics
- •9.6 Comprehensive Risk-Benefit Assessment Framework
- •References
- •10.1 Introduction
- •10.2 Lithium
- •10.2.1 Placental Transfer
- •10.2.2 Embryonic Period: Organogenesis
- •10.2.4 Child Development
- •10.2.5 Maternal Management
- •10.4 Antiepileptic Drugs
- •10.4.1 Placental Transfer
- •10.4.2 Carbamazepine
- •10.4.2.1 Embryonic Period: Organogenesis
- •10.4.3 Valproates
- •10.4.3.1 Embryonic Period: Organogenesis
- •10.4.4 Lamotrigine
- •10.4.4.1 Embryonic Period: Organogenesis
- •10.5 Conclusion
- •References
- •11: Mood Stabilizers During Lactation
- •11.1 Introduction
- •11.4.1 Lithium
- •11.4.2 Valproate
- •11.4.3 Carbamazepine
- •11.4.4 Oxcarbazepine
- •11.4.5 Lamotrigine
- •11.4.6 Topiramate
- •11.4.7 Gabapentin
- •11.6 Conclusion
- •References
- •12.1 Introduction
- •12.4.1 Benzodiazepines
- •12.4.2 Z-Drugs
- •12.5 Perinatal Complications
- •12.6 Conclusions
- •References
- •13.1 Introduction
- •13.2 Benzodiazepines
- •13.2.1 Diazepam
- •13.2.2 Clonazepam
- •13.2.3 Alprazolam
- •13.2.4 Lorazepam
- •13.2.5 Oxazepam
- •13.2.6 Midazolam
- •13.3 Z-Drugs
- •13.4 Conclusion
- •References
- •14.1 Introduction
- •14.2 Methadone, Buprenorphine, Buprenorphine/Naloxone
- •14.3 Naltrexone
- •14.4 Buspirone
- •14.5 Gabapentinoids
- •14.5.1 Pregabalin
- •14.5.2 Gabapentin
- •14.6 Pramipexole
- •14.7 Methylphenidate
- •14.8 Acamprosate
- •14.9 Disulfiram
- •14.10 Baclofen
- •14.11 Other Medicines
- •14.11.1 Nalmefene
- •14.11.2 Biperiden
- •14.12 Conclusions
- •References
- •15: Major Depression
- •15.1 Introduction
- •15.5.2 Safety Profile
- •15.5.3 Symptom Profile
- •15.5.5 Dosing
- •References
- •16: Bipolar Disorder
- •16.1 Introduction
- •16.2 Identifying Perinatal Bipolar Disorder
- •16.6.1 Acute Treatment
- •16.6.3 Maintenance Treatment
- •16.9 Conclusions
- •References
- •17.1 Introduction
- •17.5.1 Pregnancy
- •17.5.2 Postpartum Period
- •17.6 Conclusion
- •References
- •18: Obsessive-Compulsive Disorder
- •18.1 Introduction
- •18.3 Pharmacological Treatment
- •18.3.1 General Considerations
- •18.3.2.1 First-Line Treatment
- •Switch Between Antidepressants
- •SSRI Treatment at Supratherapeutic Doses
- •18.3.3 Prophylactic Treatment
- •18.3.3.1 Pre-conceptional Phase
- •18.3.3.2 Pregnancy
- •18.3.3.3 Postpartum Period
- •18.4 Conclusion
- •References
- •19: Anxiety Disorders
- •19.1 Introduction
- •19.6 Pharmacological Treatment
- •19.6.1 General Considerations
- •19.10 Conclusion
- •References
- •20: Posttraumatic Stress Disorder
- •20.1 Introduction
- •20.3 Pharmacological Treatment
- •20.3.1 General Considerations
- •20.4 Conclusion
- •References
- •21: Alcohol Use Disorders
- •21.1 Introduction
- •21.2 Epidemiology
- •21.7.1 Naltrexone Use
- •21.7.2 Disulfiram Use
- •21.7.3 Acamprosate Use
- •21.7.4 Nalmefene Use
- •21.7.5 Baclofen Use
- •21.7.6 Other Medications
- •21.8 Conclusions
- •References
- •22: Substance Use Disorders
- •22.1 Introduction
- •22.7 Conclusions
- •References
- •23.1 Introduction
- •23.3 Most Common Sleep Disorders During Peripartum
- •23.3.1 Insomnia
- •23.3.1.2 Pathophysiology
- •Hypnotic Benzodiazepines

9 Antipsychotics During Lactation
241
aripiprazole (0.7–1.4%), olanzapine (1.0–1.8%), and nally risperidone (2.3–4.7%)
suggesting minimal infant exposure through breast milk (Viguera etal. 2007b).
While these metrics provide valuable information, they should not be the sole
basis for determining medication compatibility with breastfeeding. They function
primarily as proxy measures and do not address the true clinical concern of whether
the exposure correlates with any serious adverse effects in the infant (Verstegen
etal. 2022; Hale’s Medications and Mothers’ Milk 2026). Other important factors,
not captured in these metrics, that may make infants particularly vulnerable to serious adverse reactions include prematurity, enhanced permeability of the blood-brain
barrier, and compromised liver function (Payne 2021; Viguera et al. 2007b;
Sadowski etal. 2013; Begg etal. 2002).
9.3.2 Medication Risk Category Classifications
Medication risk categorization systems such as the well-established Hale’s Lactation
Risk Categories (Hale’s Medications and Mothers’ Milk 2026), provide a standardized framework for evaluating medication safety during breastfeeding based on
pharmacokinetic parameters. Other recently published scoring systems consider
additional non-pharmacokinetic parameters such as the number of exposed infants
reported in the literature and prevalence of reported adverse events in calculating a
safety score (Uguz 2021). These various category risk systems provide useful guidance and reduce complex information into a simplied rating score which is certainly user-friendly for clinicians. However, they do not take into consideration
other important individual variables which are essential for nuanced clinical decision making—such as infant age and health condition, maternal illness severity, and
risks of untreated condition—are not fully captured in these standardized frameworks. Furthermore, inconsistency between these different systems can create confusion, as the same medication may receive different risk categorizations depending
on which framework is consulted. Given these constraints, clinicians should view
these risk categories as merely one element within a more comprehensive decisionmaking framework rather than the sole determinant when advising breastfeeding
mothers about medication use.
9.4 First-Generation Antipsychotics (FGAs)
First-generation antipsychotics (FGAs) are generally considered compatible with
breastfeeding. Although most lactation safety data derive from case reports and
observational studies published than controlled trials, the collective evidence demonstrate that these medications appear in minimal concentrations in breast milk and
rarely cause adverse events in exposed infants (Klinger et al. 2013; Pacchiarotti
etal. 2016; Larsen etal. 2015; Gentile 2008; McAllister-Williams etal. 2017).

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9.4.1 Haloperidol
Haloperidol is regarded as one of the safest antipsychotics to use during pregnancy
(). While lactation safety data is more limited, Multiple reviews examining haloperidol secretion into breast milk and potential infant effects have concluded that haloperidol is compatible with breastfeeding (). Evidence from observational
studies—including several case reports and a prospective observational study—suggests no acute adverse effects in breastfed infants (Whalley etal. 1981; Mendhekar
and Andrade 2011; Yoshida etal. 1998a). Only small amounts of haloperidol are
excreted into breast milk ().
In one case report, a mother started on 10mg/day of haloperidol immediately
after birth and discontinued therapy after 6weeks all while breastfeeding her infant
(Whalley etal. 1981). The infant showed no signs of sedation and was feeding well.
Follow-up assessments indicated normal development.
In another report, a mother took haloperidol (7.5–15mg/day) and trihexyphenidyl during three pregnancies and throughout the postpartum periods (Mendhekar
and Andrade 2011). She breastfed all three infants for 6–8months. All children met
developmental milestones at the time of report (ages 16months to 8years).
In a small prospective study on the long-term effects of antipsychotics in breastfed infants, a decline in developmental scores was found at 12–18months of age in
2 of 4 infants of mothers taking both haloperidol and chlorpromazine. The other 2
infants and all infants exposed to either drug alone developed normally (Yoshida
etal. 1998a).
A breastfeeding mother with schizophrenia took risperidone (1.5mg) and later
added haloperidol, which was increased from 0.8 to 1.5mg/day due to recurring
symptoms. Three days after the increase, her infant experienced excessive sedation,
poor feeding, and motor slowing, which resolved within 5 days after breastfeeding
was discontinued, suggesting the drug combination was the cause (Uguz 2019).
9.4.2 Chlorpromazine
Multiple reviews of studies that examined the secretion of chlorpromazine into
breast milk and potential adverse effects in infants have concluded that chlorpromazine may be compatible with breastfeeding (Klinger etal. 2013; Pacchiarotti etal.
2016; Drugs and Lactation Database (LactMed®) 2006e). Excretion in breast milk
appears to be in small amounts (Yoshida etal. 1998a), with an estimated relative
infant dose of 0.03–1.3% (Klinger etal. 2013; Odhejo etal. 2017). Older studies
have noted drowsiness and placidity in infants (Yoshida et al. 1998b; Wiles
etal. 1978).
In a study of four mother-infant pairs, chlorpromazine doses ranged from 50 to
600mg/day. While no acute negative effects were observed aside from possible
drowsiness, developmental delays were noted in infants exposed to both chlorpromazine and haloperidol (Yoshida etal. 1998b). In another study, two breastfed infants
were observed: one exhibited drowsiness and lethargy, potentially linked to

9 Antipsychotics During Lactation
243
chlorpromazine, while the other showed no adverse effects. Breast milk chlorpromazine concentrations were 92ng/mL in the affected infant’s mother and 7ng/mL in
the unaffected infant’s mother (Wiles etal. 1978).
Seven infants were breastfed for 3–4months while their mothers took chlorpromazine (50–150mg daily at bedtime) (Kris and Carmichael 1957). Five of the
infants were later evaluated at ages up to 4–5years, showing no noticeable issues
with behavior, emotions, or mental health (Kris and Gross 1962). Thus, while levels
in breast milk and adverse effects of exposure to chlorpromazine are low, close
supervision with attention to drowsiness and development in the infant is
recommended.
Other FGAs, such as triuoperazine and perphenazine, are compatible with
breastfeeding (Klinger etal. 2013). Again, data are limited but suggest low levels of
medication found in the breast milk and no acute adverse effects (Klinger etal. 2013).
9.5 Second-Generation Antipsychotics (SGAs)
Second-generation antipsychotics have increasingly become the preferred rst-line
treatment in the treatment of mood, anxiety, and psychotics disorders compared to
FGAs given a decreased risk of extrapyramidal side effects and their prolactinsparing properties. Although evidence supporting the reproductive safety of these
medications has expanded over the past two decades, data regarding their safety
during lactation remains signicantly less robust and continues to evolve.
9.5.1 Olanzapine
Of the SGAs, olanzapine has been the most widely studied with respect to breastfeeding and is considered a reasonable choice for women who require a secondgeneration antipsychotic while nursing (Klinger etal. 2013; Pacchiarotti etal. 2016;
Larsen et al. 2015; Uguz 2016). The bulk of the current evidence suggests that
olanzapine is compatible with breastfeeding (Drugs and Lactation Database
(LactMed®) 2006f, g). The reported relative infant dose of olanzapine ranges from
0.3% to 4% of the weight-adjusted maternal dose (Gardiner etal. 2003; Kirchheiner
etal. 2000; Ambresin etal. 2004; Lutz etal. 2008; Croke etal. 2002).
Several observational studies provide evidence that olanzapine use during breastfeeding does not adversely affect infants. A review of 10 studies (total n=64 infants
exposed to olanzapine) found that somnolence was observed in three infants (5%),
slow weight gain in two (3%), and developmental delay in three (5%) (Klinger
etal. 2013).
A prospective study found that adverse events were comparable for breastfeeding infants whose mothers were taking olanzapine (3/22 infants, 14%), nonbreastfeeding infants of mothers taking olanzapine (1/15, 7%), and breastfeeding
infants whose mothers were taking a drug known to be safe during lactation (4/51,
8%) (Gilad etal. 2011).

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A. C. Viguera et al.
A study examining the manufacturer’s safety registry, which included spontaneously reported adverse events in mothers who used olanzapine during pregnancy
and/or breastfeeding, found no adverse events were reported in 84/102 breastfed
infants (82.3%). The most common adverse events associated with exposure were
nonspecic, such as somnolence (4%), irritability (2%), tremor (2%), and insomnia
(2%) (Brunner etal. 2013).
Several studies of serum assays of infants (total n=12) exposed to olanzapine
via breast milk have not detected the drug (McAllister-Williams etal. 2017; Gilad
etal. 2011). The mechanism may be due to low absorption and distribution of the
drug in the large amounts of fat in children. However, one case report described an
infant who had a serum concentration that was approximately 40 percent of the
maternal level; subsequent infant serum concentrations were very low or undetectable (Reis and Källén 2008).
9.5.2 Risperidone andPaliperidone
The evidence suggests that risperidone and its active metabolite, paliperidone, are compatible with breastfeeding (Klinger etal. 2013; Pacchiarotti etal. 2016; Larsen etal.
2015; Uguz 2016; Risperidone 2006). The relative infant dose for risperidone ranges
from 2.3% to 9.1% of the weight-adjusted maternal dose (Klinger etal. 2013; Ilett etal.
2004). In three case report studies, infant serum assays (total n=4 infants) found that
risperidone and its active metabolite were only detected in one infant in which the
metabolite was present at minimal concentrations (Ilett etal. 2004; Aichhorn etal. 2005;
Weggelaar etal. 2011). Additionally, the reported M/P ratios were all below 0.5 (Ilett
etal. 2004). In a separate study, concentration of the metabolite in breastmilk itself has
also found to be low consistent with these ndings (Hill etal. 2000). Risperidone has
been found to cause elevated prolactin serum levels (Bray and Karri 2022) However,
high levels of prolactin alone may not affect a mother with established lactation’s ability
to breastfeed (Risperidone 2006).
Two case studies (total n =3 infants) found no acute adverse effects occurred in
breastfed infants (Ilett etal. 2004; Aichhorn etal. 2005). In mothers prescribed up to
6mg/day, no adverse effects have been reported in infants (Hill etal. 2000; Bray and
Karri 2022). One study of two mothers on 4mg/day and 6mg/day while breastfeeding
found no long-term developmental abnormalities of infants at 9months and 12months
of age, respectively (Ratnayake and Libretto 2002) Another study of a mother on 1mg/
day found no physical or neurological abnormalities at 3months of age (Weggelaar
etal. 2011).
In one recent study of a mother who started risperidone 1mg/daily on postpartum
day 12 for psychiatric episodes, researchers concluded that her preterm infant’s two
episodes of respiratory depression were likely caused by the drug (Pasi etal. 2023). A
recent 26year follow-up of a woman who took 4–5mg/day of risperidone and 2mg/day
of trihexyphenidyl while breastfeeding all ve of her children for 20–24months each,
found that all children are or have done well academically and the oldest three completed their education and were gainfully employed (Mendhekar and Andrade 2024).

9 Antipsychotics During Lactation
245
9.5.3 Quetiapine
Most studies suggest that quetiapine is compatible with breastfeeding (Klinger etal.
2013; Pacchiarotti etal. 2016; Larsen etal. 2015; Uguz 2016; Drugs and Lactation
Database (LactMed®) 2006a). Quetiapine demonstrates low excretion into breast
milk (Drugs and Lactation Database (LactMed®) 2006a). Case series report that
quetiapine was not secreted into breast milk at all at maternal daily doses <75mg,
and for higher maternal doses, infant dose was calculated to be less than 0.01mg/kg
(Misri etal. 2006; Aydin etal. 2015; Rampono etal. 2007). The reported relative
infant dose ranges from 0.07% to 0.1%, which is extremely low (Klinger etal.
2013). Quetiapine has been found to have minimal effects on prolactin levels
(Maguire 2002).
One case report of a mother on 200mg/day of quetiapine for bipolar disorder
reported no adverse effects in her breastfed infant (Uguz 2017). In another study, the
infant of a mother taking 300mg/day during the last 3months of pregnancy and
continuing post-partum was developing normally with no apparent adverse effects
(Pastol etal. 2022). Several other studies report no adverse effects in breastfed
infants of mothers taking quetiapine and other combinations of drugs including
sodium valrpoate (Aydin et al. 2015), venlafaxine (Newport et al. 2009), and
lamotrigine (Sharma and Sommerdyk 2016).
In the Misri etal. series of case reports, two infants of six were found to have
mild developmental delays at age 12months, but the persistence of these ndings
into later childhood remains unknown (Misri etal. 2006). In a prospective cohort
study in India, two infants exposed to quetiapine in breastmilk had no short-term
adverse events, however one who was also exposed in utero had motor and mental
delays at 3months (Sinha etal. 2021).
9.5.4 Aripiprazole
Although denitive data regarding the use of aripiprazole during breastfeeding are
limited to case reports, the available evidence is generally reassuring, showing minimal concentrations in breast milk with a relative infant dose estimated at 0.7–6.44%
(Aripiprazole 2006; Nordeng etal. 2014; Lutz etal. 2010). Additionally, no signicant adverse effects have been observed in breastfed infants (Klinger etal. 2013;
Pacchiarotti etal. 2016; Uguz 2016; Nordeng etal. 2014; Lutz etal. 2010; Cuomo
etal. 2018; Watanabe etal. 2011).
The primary concern regarding aripiprazole during breastfeeding stems from multiple case reports linking it to inadequate milk production and premature lactation cessation (Mantilla Reyes etal. 2020; Sahoo etal. 2023; Naughton etal. 2023; Yskes etal.
2018; Walker etal. 2019; Gentile 2014). Since aripiprazole functions as both a partial
dopamine agonist and antagonist, it can reduce serum prolactin levels in a dose-dependent manner, potentially leading to insufcient milk production by inhibiting prolactin
release (Nordeng etal. 2014; Lutz etal. 2010). However, this effect is not consistently
observed across all patients. Nevertheless, certain risk classication systems suggest

246
A. C. Viguera et al.
that an alternate medication might be more appropriate (Uguz 2021; Aripiprazole 2006)
or use with caution (Hale’s Medications and Mothers’ Milk 2026). In addition, available
reports suggest no issues with infant growth and development in the short term (Nordeng
etal. 2014; Lutz etal. 2010). A separate case report involving a mother using injectable
aripiprazole while breastfeeding indicated normal developmental progression in her
child through 3 years of age (Fernández-Abascal etal. 2021).
9.5.5 Clozapine
Clozapine stands out as the only antipsychotic generally contraindicated during
breastfeeding due to the risk for agranulocytosis (Drugs and Lactation Database
(LactMed®) 2006b). Although its RID is below 2%, its use would necessitate regular monitoring of the infant with white blood cell counts and careful observation for
sedation effects, creating practical barriers to its safe use during lactation (Klinger
etal. 2013; Pacchiarotti etal. 2016; Larsen etal. 2015; Uguz 2016; Gentile 2008;
McAllister-Williams etal. 2017; Payne 2021; Uguz 2021; Drugs and Lactation
Database (LactMed®) 2006b).
If breastfeeding is undertaken by a mother who is taking clozapine, close monitoring of the infant for hematologic effects (as is standard in adults taking clozapine) is highly recommended. Case reports suggest that clozapine tends to accumulate
readily in breast milk in a dose-dependent manner (Barnas etal. 1994; Dev and
Krupp 1995), however it does not appear to inuence maternal prolactin levels
(Maguire 2002; Bergemann etal. 2005). The relative infant dose for clozapine is
approximately 1.4% of the weight-adjusted maternal dose, but concerns about
adverse effects remain signicant (Klinger etal. 2013).
A review of two observational studies (total n=5 infants exposed to clozapine)
found that one baby suffered agranulocytosis, one baby manifested lethargy, and
one had speech delay (Klinger et al. 2013). In a separate case study, an infant
exposed during both pregnancy and breastfeeding through 1year of age had noticeable delay in speech acquisition though no other neurocognitive or motor decits
were reported (Mendhekar 2007).
In a recent case report, a woman with schizophrenia breastfed during two pregnancies while taking clozapine (Uygur and Uygur 2019). No adverse effects were reported
after the rst. During the second, under psychiatric care, she delivered while on clozapine 100mg daily, which was tapered as olanzapine was started and increased to
20mg daily. Due to ongoing hallucinations, clozapine was resumed at 50mg daily
while breastfeeding continued. After a year of pediatric follow-up, no agranulocytosis, seizures, or neurodevelopmental issues were observed in the infant (Uygur and
Uygur 2019).
Another case report described a woman with schizophrenia who took 75mg of
clozapine daily during pregnancy and postpartum while breastfeeding (extent
unspecied) (Uguz 2020). Her infant, monitored monthly with biweekly blood tests
for 6 months, showed no hematologic or other adverse effects (Uguz 2020).
However, these ndings are based on a very small sample size and limited recent data.

9 Antipsychotics During Lactation
The consensus in the medical literature recommends to avoid clozapine during
breastfeeding (Klinger etal. 2013; Pacchiarotti etal. 2016; Larsen etal. 2015; Uguz
2016, 2021; Hale 2004; Gentile 2010; Drugs and Lactation Database (LactMed®)
2006b). Recently, lactation safety scoring systems developed have also categorized
the safety of clozapine as “very low” and therefore, not recommended with breastfeeding (Uguz 2021). However, if breastfeeding is undertaken, since clozapine has
not been considered an absolute contraindication to breastfeeding, close monitoring
of the infant is warranted (Uguz 2020).
247
9.5.6 Amisulpride
Data on infant exposure to amisulpride via breastfeeding is lacking (Fortinguerra
etal. 2009; Uguz 2016; Drugs and Lactation Database (LactMed®) 2006c) and
excretion of amisulpride into breastmilk is higher than with other pharmacologically similar drugs (Drugs and Lactation Database (LactMed®) 2006c). Two case
reports show high transfer of amisulpride into breast milk with maternal dose of
200 mg/day and 400 mg/day, resulting in a relative infant dose of 6.7–10.7%,
respectively (Ilett etal. 2010; Teoh etal. 2011).
These infants, however, experienced no side effects from amisulpride exposure
and had normal development at follow-up. O’Halloran etal. (2016) assessed one
mother-infant pair with amisulpride exposure in breast milk and found the concentration to be 12-fold higher than simultaneous serum concentration (O’Halloran
et al. 2016). The infant plasma concentration was about 10.5% of the maternal
plasma concentration. Given the lack of quality studies, amisulpride’s compatibility
with breastfeeding remains largely unknown, and its use in breastfeeding should be
evaluated on a case-by-case basis.
9.5.7 Ziprasidone
Data for ziprasidone during breastfeeding are very limited (Drugs and Lactation
Database (LactMed®) 2006d). In one woman receiving a dose of 160mg/day postpartum, drug levels in milk were undetectable (Schlotterbeck etal. 2009). The milk-toplasma ratio was estimated to be 0.06, with a relative infant dose estimated at 1.2%
(Schlotterbeck etal. 2009). A separate case report found that infant exposure to ziprasidone through breast milk resulted in no acute adverse effects, and the infant was healthy
with normal growth and development at 6months of age (Werremeyer 2009).
9.5.8 Newer Second-Generation Antipsychotics
No substantial data are available on the use of asenapine (2006), brexpiprazole
(2006), cariprazine (2006), iloperidone (2006), lumateperone (2006), or lurasidone
(2006) during breastfeeding. However, insufcient data does not automatically
imply that a medication is “unsafe” or incompatible with nursing.

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9.6 Comprehensive Risk-Benefit Assessment Framework
Clinical decision-making regarding antipsychotic use during breastfeeding requires
careful consideration of multiple factors. An individualized assessment tailored to
each mother-infant pair’s specic circumstances, including psychiatric history,
medication response, and infant health status is recommended. Informed decisionmaking involves engaging mothers in the process with complete information about
benets, as well as known and unknown risks. Throughout this process, the mother’s own preferences regarding breastfeeding should be considered as a critical
component. An assessment framework is presented below:
9.6.1 Assessment ofMaternal Factors andInfant Factors
Maternal mental health must be prioritized, as untreated psychiatric illness
poses greater risks to both mother and infant than medication exposure through
breast milk (Miller etal. 2023). While breastfeeding offers important benets,
delaying necessary psychiatric medications only to continue breastfeeding can
have serious consequences including deteriorating mental health symptoms,
prolonged periods without treatment, and negative effects on both maternal and
infant well-being. Women who have remained stable on a psychotropic regimen
during pregnancy should generally maintain their regimen postpartum, as
changing medications solely for the purpose of breastfeeding is not recommended (Miller etal. 2023).
For patients who are initiating treatment with an antipsychotic during the
postpartum period, medication selection should be guided by what has been
effective in the past. If a medication is started de novo, the patient’s symptomatology and severity of symptoms should guide medication selection. A family
history of a good response to a particular medication may also help guide medication choice.
The decision to breastfeed while taking medications is more complicated when a
baby is premature or medically compromised (Nonacs etal. 2016; Llewellyn and
Stowe 1998). The infant’s gestational age signicantly impacts medication metabolism, as premature infants have reduced metabolic capacity compared to full-term
infants. Since most psychotropic medications are metabolized by the liver, there is
lower capacity for hepatic drug metabolism (one-third to one-fth of adult capacity)
during the rst few weeks of a full-term infant’s life (Verstegen etal. 2022; Begg
etal. 2002; Kelsey 2016). This capacity increases dramatically over the rst few
months, and by about 2–3months of age actually surpasses that of adults. In premature infants or in infants with signs of compromised hepatic function (e.g., hyperbilirubinemia), breastfeeding is typically deferred because these infants are less
able to metabolize drugs and may be more susceptible to experience adverse events
(Verstegen etal. 2022; Begg etal. 2002; Kelsey 2016).

9 Antipsychotics During Lactation
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9.6.2 Review ofMedication Options
Although SGAs with most evidence for their safety in breastfeeding are generally
preferred, when treatments with less evidence are medically necessary, breastfeeding should not be discontinued or discouraged. Rather, clinicians should work collaboratively with patients by clearly discussing these uncertainties, honoring the
patient’s informed decision, and continuing pregnancy medications if they have
been effective (Miller etal. 2023). For example, olanzapine, quetiapine, and risperidone have the most safety data during lactation and appear to be reasonable choices
for breastfeeding women, while clozapine should generally be avoided. In addition,
considering the medication’s potential impact on milk supply is important.
The “pumping and dumping” practice (temporarily expressing and discarding
breast milk) was once advocated to reduce medication levels in breast milk.
Currently, this approach is discouraged for women on psychotropic medications,
including antipsychotics (Burkey and Holmes 2013). For medications at steadystate concentrations in maternal circulation, this strategy is ineffective since newly
produced milk will contain comparable medication levels regardless of previous
pumping (Burkey and Holmes 2013). Since this method does not accelerate medication elimination from the mother’s system, it can create needless anxiety as mothers
may obsess over synchronizing medication administration with their infant’s feeding routine. Instead, mothers should be reassured that the use of medications while
breastfeeding rarely negatively impacts infants (Anderson etal. 2016).
9.6.3 Preserving Sleep andDeveloping Feeding Plan
Sleep disruption represents a critical concern for breastfeeding mothers with psychiatric conditions, particularly for those with bipolar disorder or psychotic disorders, where sleep deprivation can trigger relapse (Nonacs etal. 2016; Llewellyn and
Stowe 1998).
Thus, when planning postpartum care, clinicians should assess the mother’s history of sleep-related relapses, her sensitivity to sleep deprivation, availability of
nighttime support, and feasibility of incorporating formula or expressed milk to
share caregiving responsibilities. Exclusive breastfeeding, which requires mothers
to perform all feedings or maintain regular pumping sessions, can create a challenging cycle where sleep deprivation may worsen psychiatric symptoms, potentially
compromising both maternal well-being and breastfeeding success. Partial breastfeeding with formula supplementation allows another caregiver to handle some or
all-night feedings, enabling the mother to obtain longer periods of uninterrupted
sleep. Using expressed breast milk allows partners or family members to assist with
nighttime feedings. Some mothers and families may consider hiring a lactation
nurse or doula to assist with nighttime feedings.
Many women often feel considerable societal pressure to breastfeed. For mothers with bipolar disorder or psychotic disorders, for whom sleep disruption is a
particularly signicant trigger for relapse, prioritizing sleep protection is essential
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