Mechanism of action: Thiopental ballicule
Visual mnemonic: Thiopental mascot
“Pen too tall (on) Thigh opener”
barbs → barbiturate
What it isUltra-short-acting barbiturate; induction of anesthesia and raised intracranial pressure.
Why this oneIt reduces cerebral metabolic rate more than any other induction agent.
What limits itHypotension and apnea; it accumulates on repeated dosing. No longer marketed in the US.
Molecular structure: Thiopental
FDA-approved for
- induction of anesthesia (1934)
Principal riskHypotension and apnea; accumulation on repeat dosing
Classes and tags
Clinical profile
Therapeutic safety burden3 / 4
Overdose danger3 / 4
Weight-gain liability0 / 4
Sedation liability4 / 4
QT / Torsades0 / 4
Direct muscarinic antagonism0 / 4
Embryofetal risk2 / 4
Defining liabilityAbrupt respiratory depression and cardiovascular collapse
Open Thiopental in the interactive console ↗