What is the maximum cumulative dose of intravenous epinephrine that can be administered over a 24‑hour period during cardiac arrest resuscitation?

Maximum 24-Hour Epinephrine Dose in Cardiac Arrest

There is no established maximum 24-hour cumulative dose of IV epinephrine for cardiac arrest resuscitation in current guidelines. The 2020 and 2025 American Heart Association guidelines specify only that epinephrine should be given as 1 mg IV/IO every 3-5 minutes during ongoing cardiac arrest, with dosing continuing until return of spontaneous circulation (ROSC) or termination of resuscitation efforts 1, 2.

Key Guideline Recommendations

The current standard remains:

• Dose: 1 mg IV/IO every 3-5 minutes during active CPR
• No ceiling dose specified in AHA guidelines
• Duration: Continue until ROSC or decision to terminate resuscitation
• Operationally, this translates to administering epinephrine every second cycle of CPR after the initial dose 2

Critical Clinical Context: The Epinephrine Paradox

While guidelines don't cap the dose, emerging evidence strongly suggests cumulative doses above 3 mg are associated with worse neurological outcomes, creating what has been termed the "Adrenaline Dilemma" 3:

Evidence of Harm with Higher Cumulative Doses:

• Cumulative doses >3 mg are consistently associated with poor neurological outcomes following ROSC 4, 5
• A registry study found cumulative doses >15 mg during CPR predicted 24-hour mortality, with cardiocirculatory death increasing linearly with dose (17.7% in those receiving no epinephrine vs 62.5% in those receiving >10 mg) 6, 7
• In ECPR patients specifically, doses >3 mg were associated with 4.6-fold higher odds of unfavorable neurological outcomes compared to ≤3 mg 4

State-Level Protocol Changes:

Recognizing this evidence, some U.S. states have begun limiting cumulative doses:

• Maryland: Maximum 4 mg cumulative
• Vermont: Maximum 3 mg cumulative 8

Practical Clinical Algorithm

For ongoing cardiac arrest resuscitation:

1. Initial dosing: Follow standard 1 mg every 3-5 minutes as per AHA guidelines 1, 2

2. After 3 mg cumulative (approximately 9-15 minutes of resuscitation):

   • Reassess reversible causes aggressively
   • Optimize CPR quality (compression depth ≥2 inches, rate 100-120/min, minimal interruptions)
   • Consider whether continued resuscitation is appropriate based on clinical context
   • If continuing, be aware each additional dose increases risk of post-resuscitation cardiocirculatory failure and poor neurological outcome

3. Post-ROSC considerations:

   • Higher cumulative doses during arrest are associated with:
     • Lower cardiac index and oxygen delivery 6
     • Higher systemic vascular resistance 6
     • Increased risk of post-resuscitation myocardial dysfunction 7, 4
   • Anticipate need for aggressive post-resuscitation hemodynamic support

Important Caveats

• The guidelines prioritize ROSC as a prerequisite to meaningful recovery, even though epinephrine improves ROSC but not neurologically intact survival 2
• No randomized trials have established an optimal maximum dose
• The association between high cumulative doses and poor outcomes may partly reflect confounding by resuscitation duration (longer arrests require more epinephrine and have worse prognosis regardless)
• Timing matters: In shockable rhythms, prioritize rapid defibrillation; give epinephrine after initial CPR and defibrillation attempts fail 2

Bottom line: While no absolute maximum exists in guidelines, the weight of observational evidence suggests cumulative doses beyond 3 mg correlate with progressively worse outcomes. This should inform shared decision-making about resuscitation duration rather than serving as a hard stop for epinephrine administration during ongoing, potentially reversible cardiac arrest.