“Consumption … saccharin solution was significantly reduced in both isolated and enriched rats following administration of d-amphetamine (2 …/kg), cocaine (30 mg/kg), morphine (10 mg/kg), nicotine (1.0 mg/kg), caffeine (20 mg/kg), alcohol (1.5 g/kg), and LiCl (0.15 M, 4 ml/kg).”