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Phenylpiracetam, also known as fonturacetam (INN Tooltip International nonproprietary name) and sold under the brand names Phenotropil, Actitropil, and Carphedon among others, is a stimulant and nootropic medication used in Russia and certain other Eastern European countries in the treatment of cerebrovascular deficiency, depression, apathy, and attention, and memory problems, among other ...
A 2020 review in Frontiers in Neuroscience found that oral GABA intake "may have beneficial effects on stress and sleep", but also stated that further research is needed. [ 11 ] References
It is made from pregnenolone, and is a positive allosteric modulator of the action of γ-aminobutyric acid (GABA) at GABA A receptor. [10] Allopregnanolone has effects similar to those of other positive allosteric modulators of the GABA action at GABA A receptor such as the benzodiazepines, including anxiolytic, sedative, and anticonvulsant ...
GABA is sold as a dietary supplement in many countries. It has been traditionally thought that exogenous GABA (i.e., taken as a supplement) does not cross the blood–brain barrier, but data obtained from more recent research (2010s) in rats describes the notion as being unclear. [2] [3] The carboxylate form of GABA is γ-aminobutyrate.
A GABA reuptake inhibitor (GRI) is a type of drug which acts as a reuptake inhibitor for the neurotransmitter gamma-Aminobutyric acid (GABA) by blocking the action of the gamma-Aminobutyric acid transporters (GATs). This in turn leads to increased extracellular concentrations of GABA and therefore an increase in GABAergic neurotransmission. [1]
At GABA A receptors etifoxine binds at the α+β− interface and preferentially potentiates α 2 β 3 γ 2 and α 3 β 3 γ 2 receptor types. [25] This direct allosteric potentiation can only be observed at relatively high concentrations (starting at >1 mM) and is perhaps not physiologically relevant at normal human doses. [ 26 ]
Bretazenil has a more broad spectrum of action than traditional benzodiazepines as it has been shown to have low affinity binding to α 4 and α 6 GABA A receptors in addition to acting on α 1, α 2, α 3 and α 5 subunits which traditional benzodiazepine drugs work on. The partial agonist imidazenil does not, however, act at these subunits.
A GABA receptor agonist is a drug that is an agonist for one or more of the GABA receptors, producing typically sedative effects, and may also cause other effects such as anxiolytic, anticonvulsant, and muscle relaxant effects. [1]