Neonatal Jitteriness Causes and Characteristics

Maternal Substance Exposure

A comprehensive maternal drug history is essential, as neonatal withdrawal has increased 10-fold in recent years, with opioids causing withdrawal in 55-94% of exposed neonates, and SSRIs presenting with tremors, irritability, and jitteriness within hours to days, lasting 1-4 weeks, according to the American Academy of Pediatrics 1, 2
Benzodiazepines, including clonazepam, cause tremors and jitteriness with onset from hours to weeks, potentially lasting 1.5-9 months, and barbiturates produce severe tremors with onset in first 24 hours or delayed up to 10-14 days, as reported by the American Academy of Pediatrics 1, 2
Caffeine causes jitteriness at birth, lasting 1-7 days, and cocaine/stimulants produce neurobehavioral abnormalities including tremors and hyperactivity, typically on postnatal days 2-3, according to the American Academy of Pediatrics 1, 2

Jitteriness differs from seizures by being stimulus-sensitive, ceasing with passive flexion of affected limb, and having no abnormal eye movements or autonomic changes, predominantly affecting limbs rather than face, as noted by the National Society of Genetic Counselors 3
A physical examination should be performed to look for focal neurologic findings, abnormal tone, or dysmorphic features, as recommended by the National Society of Genetic Counselors 3

The American Academy of Pediatrics recommends serum glucose testing to identify hypoglycemia as a common provoked cause of jitteriness, with a metabolic workup that includes serum calcium and magnesium to identify hypocalcemia, which can cause provoked seizures and jitteriness 4, 5
Maternal substance exposure, including SSRI, benzodiazepine, clonazepam, opioid, and caffeine use, should be evaluated as potential causes of neonatal withdrawal with tremors, irritability, and poor feeding, with symptoms lasting from hours to months 5

The American Academy of Pediatrics recommends immediate reversal of any identified metabolic derangements, such as hypoglycemia, hypocalcemia, and hypomagnesemia, and management of neonatal drug withdrawal syndromes if maternal substance exposure is confirmed 4, 5
Neuroimaging and EEG should be reserved for cases with focal neurologic findings, seizure concern, or atypical features, with a treatment approach that prioritizes reassurance of parents about the benign nature and excellent prognosis when metabolic causes are excluded 4