By Sheryl Ankrom, About.com
Created: July 23, 2009
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
Gamma-aminobutyric acid (GABA) is a major inhibitory brain chemical that blocks the transmission of a signal from one brain cell to another. It is important for balancing the excitation in the brain and is like a brake pedal for anxiety. Benzodiazepines (anti-anxiety drugs) work on the GABA receptors of the brain, inducing a state of relaxation.
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