ABSTRACT
The effects of various barbiturates on LiCl induced taste aversion were examined. Rats were adapted to a 23 hr and 50 min water deprivation schedule. On the Treatment Day, animals were offered a novel 0.125% saccharin solution and then administered 3.0 mEq/kg LiCl. The saccharin solution was presented again on three subsequent Test Days. Fifteen minutes prior to drinking on the first Test Day animals were injected subcutaneously with either 10, 30, and 50 mg/kg Amobarbital, 3, 9, and 15 mg/kg Pentobarbital, 40, 80, and 120 mg/kg Barbital, or 1, 3, and 9 mg/kg Hexobarbital. Results indicate that only 30 mg/kg of Amobarbital and 15 mg/kg of Pentobarbital significantly attenuated the magnitude of taste aversion.
Subject(s)
Avoidance Learning/drug effects , Barbiturates/pharmacology , Lithium/pharmacology , Animals , Drug Interactions , Female , Rats , Saccharin/pharmacology , Taste , Time FactorsABSTRACT
The effects of methylphenidate, 1.5, 3.0, 6.0 and 12.0 mg/kg, on lever pressing, schedule induced licking, and drinking were studied. The generator schedule was a fixed interval 1 min food reinforcement schedule. The effects were assessed when animals were reduced to 80% body weight by partial food deprivation and when allowed to recover body weight under conditions of ad lib eating. Results indicate that under body weight conditions methylphenidate significantly decreases schedule induced licking and drinking but does not affect lever pressing.
