The benzodiazepine receptor antagonists flumazenil and CGS8216 block the enhancement of fear conditioning and interference with escape behavior produced by inescapable shock.
Maier SF, Grahn RE, Maswood S, Watkins LR. The benzodiazepine receptor antagonists flumazenil and CGS8216 block the enhancement of fear conditioning and interference with escape behavior produced by inescapable shock. Psychopharmacology (Berl). 1995 Sep; 121(2):250-8.