In contrast, other BZ-binding site ligands, such as 6-(2bromophenyl)-8-fluoro-4H-imidazo [1,5-a][1,4] benzodiazepine-3-carboxamide (imidazenil), which fail to allosterically and positively modulate the action of GABA at GABA(A) receptors with alpha(1) subunits but that selectively allosterically modulate cortical GABA(A) receptors containing alpha(5) subunits, contribute to the anxiolytic, antipanic, and anticonvulsant actions of these ligands without producing sedation, amnesia, or tolerance.