Duloxetine (sold in the United Sates under the brand name of Cymbalta) is a serotonin-norepinephrine reuptake inhibitor (SNRI) effective for major depressive disorder and generalized anxiety disorder (GAD). Although used fairly commonly in women of child-bearing age, information regarding its reproductive safety has been lacking.
Over the last few years, we have reported on several studies which have suggested an increased risk of certain types of cardiovascular malformations among children exposed to selective serotonin reuptake inhibitors (SSRIs) during pregnancy. The first reports suggested a link between cardiac septal defects and exposure to paroxetine; subsequent studies have also shown elevated risks with the other SSRIIs.
While data accumulated over the last 30 years suggest that certain antidepressants may be used with relative safety during pregnancy, our knowledge regarding the risks of prenatal exposure to psychotropic medications is incomplete. Because neuronal migration and differentiation occur throughout pregnancy and into the early years of life, development of the central nervous system (CNS) remains particularly vulnerable throughout pregnancy.
In a recent retrospective cohort study, data collected from linked records from the Women's and Children's Health Network in South Australia were used to investigate neonatal outcomes in children exposed prenatally to selective serotonin reuptake inhibitors (SSRIs). Women were included in this study if they gave birth to a singleton, live-born infant between September 2000 and December 2008 (n = 33,965).
Over the past few years, there have been a large number of studies which have relied on large administrative databases to generate information on the reproductive safety of various medications. One of the strengths of this type of approach is that it provides an opportunity to observe outcomes in a large number of subjects; however, there are certain, very important limitations. A recent study published in the American Journal of Obstetrics and Gynecology helps to understand some of the challenges in interpreting the data generated from these studies.
Antenatal exposure to Wellbutrin (bupropion) does not appear to be associated with an increased risk of malformations in the exposed infant; however, it is not known if exposure to Wellbutrin during pregnancy has any effect on the child’s neurobehavioral development. In a study from Figueroa and colleagues published in 2010, insurance claims data from 38,704 children and their families were analyzed, using information obtained from the beginning of pregnancy until age 5. Outcomes were assessed in mothers taking selective serotonin reuptake inhibitors (SSRIs) or Wellbutrin before, during or after the pregnancy. This study sought to determine the risk of ADHD in exposed infants. Children up to the age of 5 were identified as having ADHD if they had an outpatient or inpatient claim with a primary or secondary diagnosis of ADHD or a prescription claim for stimulants.
A few weeks after the FDA called into question the association between SSRI exposure and persistent pulmonary hypertension of the newborn or PPHN, BMJ published another article supporting an increased risk of PPHN among infants exposed to SSRIs in utero.
In 2006, Chambers and colleagues published an article in the New England Journal of Medicine linking SSRI use during late pregnancy to an increased risk of persistent pulmonary hypertension in the newborn (PPHN). Based on these findings, the “Usage in Pregnancy” section on the labels for SRRI antidepressants was updated to include the following warning: “Infants exposed to SSRIs in late pregnancy may have an increased risk for persistent pulmonary hypertension of the newborn (PPHN).”
Both citalopram and escitalopram are antidepressants belonging to the SSRI class. While escitalopram (marketed in the U.S. as Lexapro) contains only the S-stereoisomer (or enantiomer) of the drug citalopram, Celexa or generic citalopram is a racemic mixture of the S-citalopram and its mirror image, R-citalopram, which is less effective as an antidepressant.
![By Vera Kratochvil [Public domain], via Wikimedia Commons](https://womensmentalhealth.org/wp-content/uploads/2015/06/Mother_Kissing_Baby-320x202.jpg)
Serotonin (5-HT) is one of the neurotransmitters involved in mood regulation and has been implicated in the development of mood and anxiety disorders. Serotonin transporters (SERT) facilitate the transfer of serotonin into neurons; serotonin reuptake inhibitor (SSRI) antidepressants bind to these transporters and appear to exert their effect on mood by inhibiting the reuptake of serotonin and thus increasing the levels of this neurotransmitter at the synapse.
