At a Glance
Etomidate intravenous injection is approved for induction of general anesthesia and for supplementation of subpotent anesthesia during short procedures in adults and children.
Generic/Biosimilar name: Etomidate.
Active ingredient: Etomidate.
Administration route: Intravenous.
Typical IV induction dosing is about 0.2–0.6 mg/kg given as a slow bolus, with lower doses in older or very ill patients.
How It Works
- Etomidate is a general anesthetic that slows activity in the brain so you become unconscious for procedures.
- It mainly enhances the effect of GABA, a natural calming brain chemical, making brain cells less likely to fire.
- This leads to quick loss of consciousness within seconds and a short duration of effect after a single IV dose.
Treatment and Efficacy
Approved indications
Etomidate IV is FDA‑approved for induction of general anesthesia and for supplementation of subpotent anesthesia during short surgical or diagnostic procedures.
Off‑label uses
Clinicians sometimes use etomidate for rapid sequence intubation in emergency and critical care settings and occasionally for procedural sedation; these uses are supported by clinical experience and studies but are not FDA‑approved.
Efficacy expectations
Loss of consciousness typically occurs within 30–60 seconds of IV injection and lasts several minutes after a single induction dose, often followed by another anesthetic for maintenance. Compared with many other induction agents, etomidate has minimal effects on heart rate and blood pressure, making it useful in hemodynamically unstable patients, though it suppresses adrenal steroid production transiently.
Dosage and Administration
Typical dosing and administration
For IV induction of general anesthesia in adults, etomidate is commonly given as a slow IV bolus of about 0.2–0.6 mg/kg, with lower doses for older, debilitated, or critically ill patients; pediatric dosing is weight‑based and determined by the anesthesia provider. The drug is injected directly into a vein by trained staff, often through an existing IV line, usually immediately before airway management and maintenance anesthesia.
Special dosing instructions
Dosing is individualized based on age, medical condition, other medications, and hemodynamic status. Repeated boluses or continuous infusions are generally avoided or kept as short as possible because of adrenal suppression risk. No instructions about taking it with food apply, since it is only given in medical settings.
Missed dose guidance
There is no missed‑dose concept for patients, as each dose is administered and timed by healthcare professionals during a procedure.
Overdose
In case of excessive dosing, management includes airway protection, assisted ventilation, cardiovascular support, and monitoring in a controlled setting until the drug’s effects wear off.
Safety and Side Effects
Common side effects
Common effects include brief pain at the injection site, muscle movements or myoclonus, nausea, vomiting, and temporary changes in breathing. These usually occur at the time of dosing or shortly afterward and are typically short‑lived under close monitoring.
Serious or rare adverse effects
Serious reactions can include severe allergic reactions, dangerous drops in breathing or oxygen levels, and prolonged suppression of adrenal hormone production, especially with repeated doses or continuous infusions. In very ill patients, adrenal suppression may worsen low blood pressure or the response to stress.
Warnings and precautions
Use requires careful monitoring in patients with existing adrenal insufficiency, severe infection (sepsis), or those who depend on stress hormone responses. In pregnancy, etomidate is generally reserved for situations where benefits outweigh risks; similar caution applies to breastfeeding because detailed human data are limited. Dose adjustments and close monitoring are needed in frail, elderly, or critically ill patients.
Safety compared with similar drugs
Compared with some other IV anesthetics, etomidate tends to preserve blood pressure and heart function better, but it has a higher risk of adrenal suppression and myoclonus. It is administered only by trained professionals in settings equipped to manage airway and cardiovascular support.
Reporting side effects and safety updates
Side effects can be reported to the FDA MedWatch program or to the drug manufacturer, and safety updates are published through official prescribing information and regulatory safety communications.
Interactions and Precautions
Drug and substance interactions
Other medicines that depress the central nervous system (such as opioids, benzodiazepines, inhaled anesthetics, or alcohol) can increase sedation and respiratory depression when used with etomidate. Some blood pressure medicines and other anesthetic agents may influence how blood pressure and heart function respond during induction.
Precautions and conditions requiring caution
Caution is needed in patients with adrenal insufficiency, long‑term steroid use, severe sepsis, or shock, as etomidate can further reduce adrenal hormone production. Clinicians also consider interactions with drugs affecting blood pressure, heart rhythm, and electrolyte balance, as these may alter the hemodynamic response.
Monitoring needs
During and after etomidate administration, continuous monitoring of breathing, oxygen levels, heart rhythm, and blood pressure is standard. In critically ill patients or when larger or repeated doses are used, clinicians may monitor adrenal function and overall hemodynamic stability more closely.
Common Questions and Answers
Q: What is etomidate used for?
A: Etomidate is an intravenous anesthetic used mainly to make people unconscious quickly for the start of general anesthesia and sometimes for rapid sequence intubation or brief procedures.
Q: How fast does etomidate work and how long does it last?
A: It usually causes loss of consciousness within about 30–60 seconds after injection, and a single dose typically lasts only a few minutes before other drugs are used to maintain anesthesia.
Q: Why might a doctor choose etomidate instead of other anesthetic drugs?
A: Etomidate is often chosen when it is important to keep blood pressure and heart function as stable as possible, such as in some critically ill or hemodynamically unstable patients.
Q: Can etomidate be used more than once or as a continuous infusion?
A: While repeated doses or short infusions may be used in some situations, prolonged or repeated use is generally limited because etomidate can suppress adrenal hormone production.
Q: Will I ever need to store or handle etomidate at home?
A: No, etomidate is given only by trained healthcare professionals in hospitals or similar facilities, and they handle all storage and disposal.
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Disposal Guidance
Storage
Vials are stored and handled by healthcare facilities, usually at controlled room temperature and protected from extreme heat or freezing.
Disposal
Leftover drug and used vials or syringes are disposed of as medical waste by healthcare staff; patients generally do not store or dispose of etomidate themselves.