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To induce general anesthesia, propofol is the drug used almost exclusively, having largely replaced sodium thiopental. [13]It is often administered as part of an anesthesia maintenance technique called total intravenous anesthesia, using either manually programmed infusion pumps or computer-controlled infusion pumps in a process called target controlled infusion (TCI).
The term benzodiazepine is the chemical name for the heterocyclic ring system (see figure to the right), which is a fusion between the benzene and diazepine ring systems. [197] Under Hantzsch–Widman nomenclature, a diazepine is a heterocycle with two nitrogen atoms, five carbon atom and the maximum possible number of cumulative double bonds.
The ionotropic GABA A receptor protein complex is also the molecular target of the benzodiazepine class of tranquilizer drugs. Benzodiazepines do not bind to the same receptor site on the protein complex as does the endogenous ligand GABA (whose binding site is located between α- and β-subunits), but bind to distinct benzodiazepine binding sites situated at the interface between the α- and ...
Benzodiazepines are the preferred initial treatment, after which typically phenytoin is given. [1] Possible benzodiazepines include intravenous lorazepam as well as intramuscular injections of midazolam. [6] A number of other medications may be used if these are not effective, such as phenobarbital, propofol, or ketamine. [1]
However, some general anaesthetics like propofol and high doses of barbiturates may not only be positive allosteric modulators of GABA-A receptors but also direct agonists of these receptors. Alcohol is an indirect GABA agonist. GABA is the major inhibitory neurotransmitter in the brain, and GABA-like drugs are used to suppress spasms. Alcohol ...
Phenazepam is a drug of the benzodiazepine class. Benzodiazepine drugs contain a benzene ring fused to a diazepine ring, which is a seven membered ring with the two nitrogen constituents located at R1 and R4. The benzyl ring of phenazepam is substituted at R7 with a bromine group.
Several efficient benzodiazepines offer choices about dosage form, length of action, metabolic interaction and safety. Benzodiazepines function by binding to the benzodiazepine site on most, but not all, GABA A receptors. GABA A modulation by benzodiazepine site agonists is self-limiting. The channel conductance is not higher in the presence of ...
Flurazepam is a "classical" benzodiazepine; some other classical benzodiazepines include diazepam, clonazepam, oxazepam, lorazepam, nitrazepam, bromazepam, and clorazepate. [15] Flurazepam generates an active metabolite, N-desalkylflurazepam, with a very long elimination half-life. [3]