What is the appropriate dosage of etomidate for rapid sequence induction in a 70 kg patient?

The appropriate dosage of etomidate for rapid sequence induction in a patient typically falls within the range of 0.2 to 0.3 mg/kg. For a 70 kg patient, this translates to a dosage of approximately 14 mg to 21 mg. Given the options provided and the common practice, the 20 mg dose aligns closely with this recommended range.

Using a dose of 20 mg ensures that the patient receives an effective level of sedation while minimizing the risk of adverse effects that could arise from higher doses. Etomidate is often favored in rapid sequence induction for its minimal cardiovascular effects and its ability to provide quick sedation for intubation, making it crucial to use the correct dosage to maximize its benefits. Hence, the selection of 20 mg is justified as it adheres to established dosing guidelines for rapid sequence induction in emergency settings.