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. 2011 Jul;118(1):111-120.
doi: 10.1097/AOG.0b013e318220edcc.

Selective serotonin reuptake inhibitors and risk for major congenital anomalies

Heli Malm  1 , Miia Artama, Mika Gissler, Annukka Ritvanen
Affiliations

Selective serotonin reuptake inhibitors and risk for major congenital anomalies

Heli Malm et al. Obstet Gynecol. 2011 Jul.

Abstract

Objective: To estimate the risk of major congenital anomalies after exposure to selective serotonin reuptake inhibitors during pregnancy.

Methods: A retrospective cohort study based on national population-based registers (years 1996-2006) of births, congenital anomalies, and terminations of pregnancy because of severe fetal anomalies (maintained by National Institute for Health and Welfare, source offspring population n=635,583) and drug reimbursements (Social Insurance Institution) linked by a personal identification number. Offspring exposed to selective serotonin reuptake inhibitors during the first trimester (n=6,976) were compared with unexposed referent offspring.

Results: Overall major congenital anomalies were not more common in selective serotonin reuptake inhibitor-exposed offspring compared with unexposed referent offspring (adjusted odds ratio [OR] 1.08, 95% confidence interval [CI] 0.96-1.22). Fluoxetine was associated with an increased risk of isolated ventricular septal defects (adjusted OR 2.03, 95% CI 1.28-3.21) and paroxetine was associated with an increased risk of right ventricular outflow tract defects (adjusted OR 4.68, 95% CI 1.48-14.74). Citalopram use was associated with neural tube defects (adjusted OR 2.46, 95% CI 1.20-5.07). Fetal alcohol spectrum disorders were 10-times more common in the selective serotonin reuptake inhibitor-exposed offspring than in unexposed referent offspring.

Conclusion: Fluoxetine use is associated with an increased risk of isolated ventricular septal defects and paroxetine is associated with right ventricular outflow tract defects. The absolute risk for these specific cardiac anomalies is small but should guide clinicians not to consider fluoxetine or paroxetine the first option when prescribing selective serotonin reuptake inhibitors to women planning pregnancy. Special attention should be given to alcohol use in pregnant women using selective serotonin reuptake inhibitors.

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