Pediatric Epinephrine Dose Calculator

Emergency Pediatric Epinephrine Dosing Guidelines

Epinephrine (adrenaline) is the primary, life-saving medication for severe pediatric emergencies, including anaphylaxis, cardiac arrest, severe symptomatic bradycardia, and acute upper airway obstruction (croup). Because pediatric patients vary widely in weight, epinephrine must be carefully calculated using weight-based protocols and the appropriate drug concentration.

Administering the wrong concentration (such as giving undiluted 1:1,000 intravenously instead of 1:10,000) or miscalculating a decimal place can result in severe cardiac arrhythmias, extreme hypertension, or subtherapeutic underdosing. This Pediatric Epinephrine Dose Calculator provides immediate, protocol-specific dosages, correct drug concentrations, delivery volumes, and autoinjector recommendations across all major pediatric clinical indications.

Clinical Indications, Concentrations, and Dosages

1. Anaphylaxis (Intramuscular Route - IM)

Intramuscular injection into the mid-outer thigh (vastus lateralis) is the gold standard for acute allergic anaphylaxis. Absorption from the thigh is substantially faster and more reliable than injection into the deltoid or subcutaneous tissue.

Required Concentration: 1:1,000 (1 mg/mL)
Weight-Based Dosage: 0.01 mg/kg (equivalent to 0.01 mL/kg of 1:1,000 solution)
Maximum Single Dose: 0.3 mg (0.3 mL) in prepubertal children; 0.5 mg (0.5 mL) in teenagers and adults
Frequency: May repeat every 5 to 15 minutes if symptoms persist or progress

$$\text{IM Dose (mg)} = \min\left(\text{Weight (kg)} \times 0.01\text{ mg/kg}, 0.3\text{ mg}\right)$$

$$\text{IM Volume (mL of 1:1,000)} = \frac{\text{IM Dose (mg)}}{1\text{ mg/mL}} = \text{IM Dose (mg)}$$

2. Pediatric Advanced Life Support (PALS) Cardiac Arrest (IV / IO)

During pediatric cardiopulmonary resuscitation (CPR) for non-shockable rhythms (asystole/PEA) or refractory shockable rhythms (VF/pVT):

Required Concentration: 1:10,000 (0.1 mg/mL)
Weight-Based Dosage: 0.01 mg/kg (equivalent to 0.1 mL/kg of 1:10,000 solution)
Maximum Single Dose: 1.0 mg (10 mL of 1:10,000 solution)
Administration: Rapid IV/IO push followed by a 5 mL normal saline flush
Frequency: Repeat every 3 to 5 minutes during resuscitation

3. Endotracheal Tube (ET) Administration

When vascular (IV) or intraosseous (IO) access is unavailable during cardiac arrest, epinephrine may be given down an endotracheal tube:

Required Concentration: 1:1,000 (1 mg/mL)
Weight-Based Dosage: 0.1 mg/kg (equivalent to 0.1 mL/kg of 1:1,000 solution)
Maximum Single Dose: 2.5 mg (2.5 mL)
Administration: Follow with 1 to 5 mL normal saline flush and several positive pressure ventilations

4. Nebulized Epinephrine for Croup (Laryngotracheobronchitis)

Inhaled racemic or L-epinephrine stimulates alpha-adrenergic receptors in upper airway mucosa, inducing vasoconstriction and decreasing subglottic edema:

Required Solution: L-epinephrine 1:1,000 (1 mg/mL)
Weight-Based Dosage: 0.5 mL/kg up to a maximum volume of 5 mL
Dilution: Dilute with 2 to 3 mL normal saline to achieve adequate nebulizer chamber volume
Post-treatment Monitoring: Observe for a minimum of 2 to 4 hours due to potential rebound stridor

Pediatric Auto-Injector Weight Categories

Patient Weight	Recommended Auto-Injector	Delivered Dose
Under 7.5 kg (under 16.5 lb)	Manual calibrated 1 mL syringe preferred (or 0.1 mg Auvi-Q if prescribed)	0.01 mg/kg exact dose
7.5 kg to 25 kg (16.5 to 55 lb)	EpiPen Jr / Auvi-Q 0.15 mg / Generic Junior 0.15 mg	0.15 mg (1:2,000 / 0.3 mL)
25 kg and above (55 lb and above)	EpiPen / Auvi-Q 0.3 mg / Generic Adult 0.3 mg	0.30 mg (1:1,000 / 0.3 mL)

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Frequently Asked Questions

Why is 1:1,000 used for IM anaphylaxis while 1:10,000 is used for IV resuscitation?

Concentrated 1:1,000 (1 mg/mL) allows effective IM delivery in small, manageable injection volumes (0.1 to 0.3 mL) without excessive fluid in the muscle. Conversely, diluted 1:10,000 (0.1 mg/mL) is safer for IV push, reducing the risk of severe tachycardia, ventricular fibrillation, and acute myocardial infarction associated with accidental boluses of concentrated epinephrine.

Where is the preferred anatomical site for pediatric IM epinephrine?

The anterolateral middle third of the thigh (vastus lateralis muscle) is the universally recommended site. Studies show significantly faster plasma peak concentrations from the thigh compared to the upper arm deltoid muscle or gluteal tissue.

How often can epinephrine be repeated during an anaphylactic reaction?

If severe symptoms such as airway swelling, wheezing, dizziness, or hypotension do not improve after 5 minutes, a second dose of IM epinephrine can be given in the opposite thigh. Most patients responding well require only 1 or 2 doses while emergency transport is underway.

What is the maximum single dose of epinephrine for a child with anaphylaxis?

The standard maximum single intramuscular dose for children is 0.3 mg (0.3 mL of 1:1,000). For adolescents weighing 30 kg or more with severe symptoms, adult dosing up to 0.5 mg (0.5 mL) may be administered.

Why is the endotracheal dose 10 times higher than the intravenous dose?

Drug absorption across alveolar capillary membranes from the pulmonary tree into the systemic bloodstream is incomplete and slower than direct intravenous delivery. Therefore, PALS guidelines specify 0.1 mg/kg (10x the IV dose) via the ET tube.

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