Pentobarbital

Pentobarbital
Clinical data
Trade names	Nembutal
AHFS/Drugs.com	Monograph
MedlinePlus	a682416
License data	US DailyMed: Pentobarbital;
Pregnancy; category	AU: C;
Routes of; administration	By mouth, intravenous, intramuscular, rectal
ATC code	N05CA01 (WHO) QN51AA01 (WHO);
Legal status
Legal status	AU: S8 (Controlled drug); BR: Class B1 (Psychoactive drugs); CA: Schedule IV; DE: Anlage III (Special prescription form required); UK: Class B; US: Schedule II; UN: Psychotropic Schedule III; In general: ℞ (Prescription only);
Pharmacokinetic data
Bioavailability	70–90% (oral); 90% (rectal)
Protein binding	20–45%
Metabolism	Liver
Elimination half-life	15–48 hours
Excretion	Kidney
Identifiers
	IUPAC name 5-Ethyl-5-(1-methylbutyl)-2,4,6(1H,3H,5H)-pyrimidinetrione;
CAS Number	76-74-4 ;
PubChem CID	4737;
IUPHAR/BPS	5480;
DrugBank	DB00312 ;
ChemSpider	4575 ;
UNII	I4744080IR;
KEGG	D00499 ;
ChEBI	CHEBI:7983 ;
ChEMBL	ChEMBL448 ;
CompTox Dashboard (EPA)	DTXSID7023435 ;
ECHA InfoCard	100.000.895
Chemical and physical data
Formula	C11H18N2O3
Molar mass	226.276 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES O=C1NC(=O)NC(=O)C1(C(C)CCC)CC;
	InChI InChI=1S/C11H18N2O3/c1-4-6-7(3)11(5-2)8(14)12-10(16)13-9(11)15/h7H,4-6H2,1-3H3,(H2,12,13,14,15,16) ; Key:WEXRUCMBJFQVBZ-UHFFFAOYSA-N ;
	(verify)

Pentobarbital (US) or pentobarbitone (British and Australian) is a short-acting barbiturate typically used as a sedative, a preanesthetic, and to control convulsions in emergencies. It can also be used for short-term treatment of insomnia but has been largely replaced by the benzodiazepine family of drugs.

In high doses, pentobarbital causes death by respiratory arrest. It is used for veterinary euthanasia and is used by some US states and the Federal government of the United States for executions of convicted criminals by lethal injection. In some countries and states, it is also used for physician-assisted suicide.

Pentobarbital was widely abused and sometimes known as "yellow jackets" due to the yellow capsule of the Nembutal brand. Pentobarbital in oral (pill) form is not commercially available.

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