Hexobarbital
Hexobarbital is a barbiturate derivative with anesthetic and sedative properties. It was first synthesized in the early 20th century and has been used in various medical applications, particularly as a general anesthetic and hypnotic agent.
Chemical Properties
Hexobarbital, also known as 5-(1-cyclohexen-1-yl)-1,5-dimethylbarbituric acid, is a white crystalline powder that is soluble in water and alcohol. Its chemical formula is C12H16N2O3, and it has a molecular weight of 236.27 g/mol.
Pharmacology
Hexobarbital acts on the central nervous system (CNS) by enhancing the activity of the gamma-aminobutyric acid (GABA) receptor, which is the primary inhibitory neurotransmitter in the CNS. This action results in sedation, hypnosis, and anesthesia. The drug has a relatively short duration of action compared to other barbiturates, making it suitable for procedures requiring brief periods of anesthesia.
Medical Uses
Hexobarbital has been used primarily as a general anesthetic for short surgical procedures. It has also been employed as a sedative and hypnotic for the treatment of insomnia and other sleep disorders. However, due to the development of newer and safer anesthetic agents, the use of hexobarbital has declined significantly.
Side Effects
Common side effects of hexobarbital include drowsiness, dizziness, and nausea. In higher doses, it can cause respiratory depression, hypotension, and bradycardia. Long-term use can lead to tolerance, dependence, and withdrawal symptoms.
Metabolism and Excretion
Hexobarbital is metabolized in the liver by the cytochrome P450 enzyme system and is excreted primarily in the urine. The drug has a half-life of approximately 3 to 6 hours.
History
Hexobarbital was first synthesized in the 1930s and was widely used during the mid-20th century. Its use has declined with the advent of newer anesthetic agents that offer improved safety profiles and fewer side effects.
See Also
References
External Links
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