Effects of fenobam sulfate on sucrose-induced reinstatement of reward-seeking behavior and cocaine-primed reinstatement of drug-seeking behavior. (a) Two groups of animals (vehicle and 30 mg/kg, n = 6; vehicle and 60 mg/kg, n = 5) were trained to self-administer sucrose and then sucrose-taking/-seeking behavior was extinguished. Pretreatment with 60 mg/kg fenobam sulfate significantly inhibited reinstatement of extinguished sucrose-seeking behavior following non-contingent sucrose delivery. (b) Three groups of animals (vehicle, n = 10; 30 mg/kg fenobam sulfate, n = 9; 60 mg/kg fenobam sulfate, n = 9) were trained to self-administer cocaine and then cocaine-taking/-seeking behavior was extinguished. Pretreatment with fenobam sulfate (0, 30 or 60 mg/kg, p.o.) dose-dependently inhibited cocaine-induced reinstatement of extinguished drug-seeking behavior in rats. * p < 0.05, ** p < 0.01, *** p < 0.001, compared to vehicle.