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Gabitril (tiagabine) is a potent selective inhibitor of the principal neuronal gamma-aminobutyric acid (GABA) transporter (GAT-1) in the cortex and hippocampus. By slowing the reuptake of synaptically-released GABA, it prolongs inhibitory postsynaptic potentials. In animal models of epilepsy, tiagabine is particularly effective against kindled (limbic) seizures and against reflexly-induced generalized convulsive seizures. These data are predictive of its efficacy in complex partial seizures in humans. Possible clinical applications outside the field of epilepsy include bipolar disorder and pain.
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Meldrum et al. (1999) studied this question.
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