Neonatal Toxicity From Escitalopram Use In Utero: A Case Report.

Selective serotonin reuptake inhibitor (SSRI) exposure during pregnancy can result in symptoms of serotonin syndrome or serotonin withdrawal. In contrast to other SSRIs, reports of serotonin behavioral syndrome following in utero exposure to escitalopram and citalopram are limited. We describe a case of suspected toxicity following in utero exposure to 20 mg escitalopram throughout pregnancy. The infant was transferred to our neonatal intensive unit at 9 hours of life for further evaluation of lethargy, weak cry, bradycardia, and non-reactive pupils. Hypoxic ischemic encephalopathy was suspected upon presentation, despite APGAR scores of 8 and 9. Upon admission, symptoms progressed to signs of hypertonia, irritability, high-pitched cry, and posturing. The patient was loaded with phenobarbital for empiric management of suspected seizures versus drug withdrawal. Both electroencephalogram and computed tomography scan results were normal; however, an electrocardiogram revealed a prolonged QTc interval of 531 milliseconds. Signs of irritability and QTc prolongation continued through day of life (DOL) 5. The infant was discharged on DOL 10 with no further symptoms. We hypothesize that this represented a case of serotonin toxicity due to in utero exposure to escitalopram and recommend close monitoring for neonatal behavioral syndrome symptoms and QTc prolongation in infants exposed to escitalopram during pregnancy.