Etomidate half life?

What is etomidate’s half-life?

Etomidate (often given as the anesthesia induction drug etomidate) has a short elimination half-life. Reported values are about 2 to 5 hours, depending on the source and patient/clinical context [1].

Why does half-life vary in practice?

The measured “half-life” can differ across references because it depends on how it’s estimated (pharmacokinetic model, sampling timing) and on factors like patient metabolism and organ function. Etomidate is typically given as an IV bolus or infusion for anesthesia, so clinicians also rely on rapid clinical onset and offset rather than only the half-life [1].

How long do effects last compared with half-life?

Even with an elimination half-life on the order of hours, the hypnotic effect during induction often wears off quickly because drug concentrations fall from the brain faster than total body elimination. That’s why patients may recover from anesthesia effects sooner than a half-life would suggest [1].

Can you tell me whether you mean IV dosing or a specific formulation?

Half-life can be reported differently for different studies (IV vs infusion protocols). If you tell me the dosing regimen (bolus vs infusion) and the context (adult vs pediatric, normal vs impaired liver/kidney), I can narrow to the most relevant half-life range from the cited source [1].

Sources

[1] DrugBank – Etomidate: https://go.drugbank.com/drugs/DB01005