Like gabapentin, pregabalin binds to the α2δ (alpha-2-delta) subunit of the voltage-dependent calcium channel in the central nervous system. Pregabalin decreases the release of neurotransmitters including glutamate, norepinephrine, substance P and calcitonin gene-related peptide. However, unlike anxiolytic compounds (e.g., benzodiazepines) which exert their therapeutic effects through binding to GABAA, pregabalin neither binds directly to these receptors nor augments GABAA currents or affects GABA metabolism (Pfizer Inc., 2006). The half-life for pregabalin is 6.3 hours.
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