Etomidate Dosing Recommendations
For rapid sequence intubation and procedural sedation, administer etomidate 0.3 mg/kg IV in adults and 0.3-0.4 mg/kg IV in children over 10 years, injected over 30-60 seconds.
Adult Dosing
The FDA-approved dose for induction of anesthesia in adults ranges from 0.2-0.6 mg/kg IV, with 0.3 mg/kg as the standard dose 1. This should be administered over 30-60 seconds. The 2023 Society of Critical Care Medicine guidelines support using etomidate at 0.2-0.3 mg/kg for rapid sequence intubation in critically ill adults 2.
Key Points for Adults:
- Standard induction dose: 0.3 mg/kg IV
- Geriatric patients may require reduced doses due to potential decreases in heart rate and blood pressure 1
- For hemodynamically compromised patients, some clinicians use 0.15 mg/kg, though a 2023 registry study of over 12,000 intubations found no association between etomidate dose and postintubation hypotension 3
- Mean effective doses in ED studies ranged from 0.2-0.37 mg/kg 4
Pediatric Dosing
For children over 10 years: 0.3 mg/kg IV (same as adults) 1. However, pediatric emergency medicine data suggests 0.4 mg/kg may be more appropriate for children due to higher volume of distribution and clearance 5.
Specific Pediatric Recommendations:
- Children >10 years: 0.3-0.4 mg/kg IV 1, 5
- Children <10 years: Insufficient FDA data, but emergency medicine literature supports 0.3-0.4 mg/kg 4
- For procedural sedation in children 4-18 years: 0.2 mg/kg initial dose, with additional 0.1 mg/kg boluses as needed 6
- Pediatric RSI studies used mean doses of 0.37 mg/kg successfully 4
The higher pediatric dosing requirement is supported by pharmacokinetic data showing children have 30% higher volume of distribution (0.66 vs 0.27 L/kg) and higher clearance (17.2 vs 10.9 mL/kg/min) compared to adults 5.
Administration Details
- Route: Intravenous only 1
- Injection time: 30-60 seconds 1
- Onset: Within 1 minute 1
- Duration: 3-5 minutes at standard doses 1
Important Caveats
Do not use in children under 10 years for anesthesia induction per FDA labeling due to inadequate data 1. However, extensive emergency medicine literature (Class III evidence) demonstrates safe use in younger children at 0.3-0.4 mg/kg for RSI and procedural sedation 4.
Avoid dose reduction in hemodynamically unstable patients. Despite traditional teaching, the 2023 NEAR registry analysis found no association between etomidate dose (or ketamine dose) and postintubation hypotension, suggesting dose reduction may be unnecessary 3.
Single-dose use only. While etomidate causes transient adrenal suppression lasting 6-8 hours, this has not been associated with increased mortality when used as a single induction dose 2, 1.