Normal Epinephrine Dosage for Cardiac Arrest
For adults in cardiac arrest, administer 1 mg of epinephrine (1:10,000 solution) IV/IO every 3-5 minutes; for children, administer 0.01 mg/kg (0.1 mL/kg of 1:10,000 solution) IV/IO every 3-5 minutes, with a maximum single dose of 1 mg. 1, 2
Adult Dosing
The 2025 American Heart Association guidelines maintain the standard dose of 1 mg epinephrine IV/IO every 3-5 minutes for all cardiac arrest rhythms 2. This represents the most current evidence-based recommendation. Operationally, this means administering epinephrine every second cycle of CPR after the initial dose 1.
Timing Considerations
- Shockable rhythms (VF/pVT): Administer epinephrine after initial CPR and defibrillation attempts are unsuccessful—prioritize rapid defibrillation first 2
- Non-shockable rhythms (asystole/PEA): Administer epinephrine as soon as feasible once vascular access is obtained 1, 2
High-Dose Epinephrine: Not Recommended
High-dose epinephrine (0.1-0.2 mg/kg) is NOT recommended for routine use 1. Multiple studies demonstrate no survival benefit and potential harm, particularly in asphyxial arrest 1. The only exception is β-blocker overdose, where high-dose epinephrine may be considered 1.
Pediatric Dosing
Standard dose: 0.01 mg/kg (0.1 mL/kg of 1:10,000 solution) IV/IO every 3-5 minutes, maximum 1 mg per dose 1
Concentration-Specific Dosing
- IV/IO route: 0.01 mg/kg using 1:10,000 solution (0.1 mg/mL)
- Endotracheal route (if IV/IO unavailable): 0.1 mg/kg using 1:1,000 solution (1 mg/mL)—this is 10 times the IV dose 1, 3, 1
Newborn-Specific Dosing
For newborn infants during cardiopulmonary resuscitation:
- IV/IO: 0.01-0.03 mg/kg of 1:10,000 solution
- Endotracheal: 0.03-0.10 mg/kg of 1:10,000 solution 3
Critical Administration Details
Route Priority
- IV access preferred (large vein when possible)
- IO access if IV unsuccessful or delayed
- Endotracheal route only as last resort—requires higher doses and has inferior bioavailability 1, 4
Common Pitfalls to Avoid
Concentration confusion is dangerous: Epinephrine comes in two concentrations:
- 1:10,000 (0.1 mg/mL) for IV/IO cardiac arrest dosing
- 1:1,000 (1 mg/mL) for endotracheal dosing or anaphylaxis IM dosing
Using the wrong concentration can result in 10-fold dosing errors 3.
Endotracheal Administration Caveats
When giving epinephrine via endotracheal tube:
- Flush with at least 5 mL normal saline
- Follow with 5 consecutive positive-pressure ventilations 1
- Expect lower and delayed peak concentrations compared to IV/IO routes 4
- Evidence suggests endotracheal epinephrine may be less effective than vascular administration 1
Special Circumstance: Anaphylaxis-Induced Cardiac Arrest
For cardiac arrest specifically from anaphylaxis, guidelines suggest higher initial doses and more aggressive escalation 5:
Adults:
- Initial: 1-3 mg IV (1:10,000) over 3 minutes
- Second: 3-5 mg IV over 3 minutes
- Then: 4-10 mg/min infusion 5
Children:
- Initial: 0.01 mg/kg (0.1 mL/kg of 1:10,000) every 3-5 minutes
- Consider higher doses (0.1-0.2 mg/kg of 1:1,000) for unresponsive asystole/PEA 5
Standard IM anaphylaxis dosing (0.3-0.5 mg) is insufficient for cardiac arrest from anaphylaxis—IV/IO dosing at cardiac arrest doses is required 4.
Evidence Quality and Rationale
The recommendation for standard-dose epinephrine is based on consistent evidence showing improved return of spontaneous circulation (ROSC) and survival to hospital admission 2. However, a critical limitation exists: epinephrine does not improve survival with favorable neurologic outcome 2, 6. Despite this, epinephrine remains standard therapy because short-term survival is a prerequisite for any meaningful recovery, and no alternative has proven superior 2.
The 2010 AHA Pediatric Advanced Life Support guidelines 1 remain the most comprehensive pediatric-specific guidance, with consistent recommendations maintained through 2025 7. The evidence against high-dose epinephrine in children is particularly strong, showing potential harm especially in asphyxial arrest 1.