Requested by no1uno
Psychopharmacological studies of some 1-(chlorophenyl)-2-aminopropanes I. Effects on appetitive-controlled behavior
John E. Owen Jr
J. Pharm. Sciences
Vol.52(7) 1963, pp.679-683
DOI: 10.1002/jps.2600520716
Abstract
A series of 1-phenyl-2-aminopropanes with chloro substitutions on the 2, 4, 3, 4, and 4 positions on the phenyl ring and their optical isomers were compared with dl-and d-amphetamine and methamphetamine on a fixed-ratio (FR) procedure. The subjects were rats that had been trained to press a lever 30 times for 0.25-ml. reinforcement of sweetened condensed milk. Each session consisted of 40 reinforcements. With unsubstituted amphetamines, rats showed a slight reduction in response rates with long pauses following reinforcement. This effect was similar to the effect seen with onset of normal satiation. After chloro compounds, the rats produced irregular and slowed response rates with frequent short pauses between and following reinforcement. The minimum effective doses of all compounds used in this study ranged from 1–3.2 mg./Kg. Except for d-1-(4-chlorophenyl)-2-aminopropane, the l-isomers of chloro-substituted compounds were more active suppressants of FR behavior than the dl or d compounds.[/color]
Psychopharmacological studies of some 1-(chlorophenyl)-2-aminopropanes II. Effects on avoidance and discrimination behavior
John E. Owen Jr.
J. Pharm. Sciences
Vol.52(7) 1963, pp.684-688.
DOI: 10.1002/jps.2600520717
Abstract
A series of 1-(chlorophenyl)-2-aminopropanes previously shown to suppress appetitive-controlled behavior were compared with d-amphetamine and methamphetamine on an avoidance procedure. Rats trained to press a lever to avoid intermittent electroshocks were used. In alternate 10-minute periods, a rat received a time-out (TO) when no responding on the lever was necessary. The discrimination between the two periods was cued by appropriate visual stimuli. The two lowest doses that suppressed the appetitive-controlled behavior were studied. With the unsubstituted amphetamines, the rats produced high response rates during both the avoidance and TO periods with a reduction in the number of shocks received. On the whole, the chloro-substituted compounds produced relatively small increases in the rats' response rates with little or no change in the number of shocks received. These results indicate that, at the doses used, the chloro-substituted compounds produced less CNS stimulation than did d-amphetamine or methamphetamine.
Psychopharmacological studies of some 1-(chlorophenyl)-2-aminopropanes I. Effects on appetitive-controlled behavior
John E. Owen Jr
J. Pharm. Sciences
Vol.52(7) 1963, pp.679-683
DOI: 10.1002/jps.2600520716
Abstract
A series of 1-phenyl-2-aminopropanes with chloro substitutions on the 2, 4, 3, 4, and 4 positions on the phenyl ring and their optical isomers were compared with dl-and d-amphetamine and methamphetamine on a fixed-ratio (FR) procedure. The subjects were rats that had been trained to press a lever 30 times for 0.25-ml. reinforcement of sweetened condensed milk. Each session consisted of 40 reinforcements. With unsubstituted amphetamines, rats showed a slight reduction in response rates with long pauses following reinforcement. This effect was similar to the effect seen with onset of normal satiation. After chloro compounds, the rats produced irregular and slowed response rates with frequent short pauses between and following reinforcement. The minimum effective doses of all compounds used in this study ranged from 1–3.2 mg./Kg. Except for d-1-(4-chlorophenyl)-2-aminopropane, the l-isomers of chloro-substituted compounds were more active suppressants of FR behavior than the dl or d compounds.[/color]
Psychopharmacological studies of some 1-(chlorophenyl)-2-aminopropanes II. Effects on avoidance and discrimination behavior
John E. Owen Jr.
J. Pharm. Sciences
Vol.52(7) 1963, pp.684-688.
DOI: 10.1002/jps.2600520717
Abstract
A series of 1-(chlorophenyl)-2-aminopropanes previously shown to suppress appetitive-controlled behavior were compared with d-amphetamine and methamphetamine on an avoidance procedure. Rats trained to press a lever to avoid intermittent electroshocks were used. In alternate 10-minute periods, a rat received a time-out (TO) when no responding on the lever was necessary. The discrimination between the two periods was cued by appropriate visual stimuli. The two lowest doses that suppressed the appetitive-controlled behavior were studied. With the unsubstituted amphetamines, the rats produced high response rates during both the avoidance and TO periods with a reduction in the number of shocks received. On the whole, the chloro-substituted compounds produced relatively small increases in the rats' response rates with little or no change in the number of shocks received. These results indicate that, at the doses used, the chloro-substituted compounds produced less CNS stimulation than did d-amphetamine or methamphetamine.