open peer review on qeios neonatal abstinence syndrome national cancer institute source national cancer institute. neonatal abstinence syndrome. nci thesaurus. code c87101. a constellation of neurobehavioral features observed in a neonate following antenatal exposure to drugs including opioids, benzodiazepines, and selective serotonin reuptake inhibitors.open peer review on qeios neonatal abstinence syndrome national cancer institute source national cancer institute. neonatal abstinence syndrome. nci thesaurus. code c87101. a constellation of neurobehavioral features observed in a neonate following antenatal exposure to drugs including opioids, benzodiazepines, and selective serotonin reuptake inhibitors.