What is the recommended dose of adrenaline (epinephrine) for neonatal shock?

Adrenaline Dosing for Neonatal Shock

For neonatal shock requiring epinephrine, administer 0.01 to 0.03 mg/kg via the intravascular route (umbilical venous catheter or intraosseous), followed by a 3 mL normal saline flush. 1

Route-Specific Dosing Algorithm

Intravascular Administration (Preferred Route)

• Dose: 0.01 to 0.03 mg/kg via umbilical venous catheter or intraosseous access 1, 2
• Follow with 3 mL normal saline flush regardless of birth weight 1
• This provides the most rapid and reliable medication delivery with predictable bioavailability 1
• Peak plasma concentrations achieved within 1 minute of IV administration 1
• Practical preparation: Draw 0.02 mg/kg (0.2 mL/kg of 1:10,000 concentration) in a 1 mL syringe - this middle-range dose works for birth weights from 500g to 5kg and minimizes preparation errors 3

Endotracheal Administration (Only While Establishing IV Access)

• Dose: 0.05 to 0.1 mg/kg - substantially higher than IV dose due to unpredictable absorption 1, 2
• Peak plasma concentrations not achieved until 5 minutes after endotracheal administration 1
• Human observational studies demonstrate 0.01 to 0.03 mg/kg is inadequate via endotracheal route 1
• Practical preparation: Draw 0.1 mg/kg (1 mL/kg of 1:10,000 concentration) in a 5 mL syringe for endotracheal use 3
• Most infants require subsequent intravascular doses to achieve return of spontaneous circulation (ROSC) 1
• Do not delay establishing vascular access - endotracheal administration is a temporizing measure only 2

Repeat Dosing Strategy

• Administer additional doses every 3 to 5 minutes if heart rate remains <60 bpm 2
• Preferably use intravascular route for all subsequent doses 2
• If initial endotracheal dose was given, administer intravascular dose as soon as access is obtained, regardless of time interval since endotracheal administration 2
• Animal models demonstrate central venous epinephrine achieves shorter time to ROSC and higher ROSC rates compared to endotracheal route 1

Critical Context: When Epinephrine is Indicated

Epinephrine is indicated when heart rate remains <60 bpm despite:

1. Adequate ventilation with 100% oxygen (preferably through endotracheal tube or laryngeal mask) 1
2. Effective chest compressions 1, 2

Key physiologic principle: Low heart rate in newborns usually results from inadequate gas exchange or lung inflation - establishing effective ventilation is the most important resuscitation step before considering epinephrine 1

Special Considerations for Shock from Blood Loss

If shock is secondary to acute blood loss (pale appearance, weak pulses, persistent bradycardia):

• Epinephrine alone may be insufficient 1
• Administer volume expander without delay: Normal saline (0.9% sodium chloride) is the crystalloid of choice 1
• Uncrossmatched type O Rh-negative blood preferred when blood loss is substantial 1
• Route: Intravascular via umbilical line (intraosseous as alternative) 1

Common Pitfalls to Avoid

• Dosing errors are extremely common when preparing epinephrine for neonatal resuscitation 3
• Using color-coded syringes may decrease preparation errors 3
• Do not administer repeated injections at the same intramuscular site - vasoconstriction may cause tissue necrosis 4
• High-dose intravenous epinephrine (≥30 μg/kg or ≥0.03 mg/kg) poses additional hemodynamic risks without improving long-term survival 5, 6
• Endotracheal absorption is unpredictable - never rely on this route when IV access is available 7, 6

Evidence Quality Note

The 2025 American Heart Association/American Academy of Pediatrics guidelines acknowledge these recommendations carry weak strength with very low-certainty evidence, largely derived from animal models of asphyxia-induced cardiac arrest and observational human studies 2. However, animal studies consistently demonstrate epinephrine (especially IV) achieves ROSC more effectively than control treatments 2, and this represents the best available evidence for this life-threatening clinical scenario.

Human observational data show no survival difference between IV and endotracheal routes 7, but this likely reflects confounding by indication, as animal models clearly demonstrate IV superiority 1, 2.