TY - JOUR
T1 - Diazepam self-administration and resistance to extinction
AU - Grant, Kathleen A.
AU - Johanson, Chris Ellyn
N1 - Funding Information:
This research was supported by a research grant from the National Institute on Drug Abuse, DA No. 00250, Charles R. Schuster, P. I. K. Grant was supported by a National Institute of Alcohol Abuse and Alcoholism Postdoctoral Fellowship. The authors wish to thank A. L. Libby for her technical assistance. The diazepam was generously supplied by Hoffmann-LaRoche Pharmaceutical Co., Nutley, NJ.
PY - 1987/9
Y1 - 1987/9
N2 - Self-administration behavior was maintained by a unit dose of 0.03 mg/kg diazepam in 4 of 5 monkeys trained to respond on a lever by successive approximation using diazepam or saline. A dose-response function was determined using diazepam doses ranging between 0.01 and 0.3 mg/kg/infusion. Peak rates of responding occurred at doses of 0.01 or 0.03 mg/kg/infusion and drug intake was directly related to dose. When saline was substituted for diazepam either before or again after the dose-response function was determined, levels of responding remained unexpectedly high, even after as many as 16 consecutive sessions. The rates of responding maintained under extinction conditions appeared to be directly related to the amount of diazepam previously self-administered. For instance, monkeys which did not initially have high rates of responding for saline showed increases in responding after additional exposure to diazepam. Furthermore, the one monkey with low diazepam self-administration rates also had low rates of responding for saline. However, following a period of cocaine self-administration, responding declined in all monkeys when saline was substituted for cocaine. The data suggest that diazepam self-administration affects responding under extinction conditions, an effect which makes the interpretation of diazepam's reinforcing properties difficult.
AB - Self-administration behavior was maintained by a unit dose of 0.03 mg/kg diazepam in 4 of 5 monkeys trained to respond on a lever by successive approximation using diazepam or saline. A dose-response function was determined using diazepam doses ranging between 0.01 and 0.3 mg/kg/infusion. Peak rates of responding occurred at doses of 0.01 or 0.03 mg/kg/infusion and drug intake was directly related to dose. When saline was substituted for diazepam either before or again after the dose-response function was determined, levels of responding remained unexpectedly high, even after as many as 16 consecutive sessions. The rates of responding maintained under extinction conditions appeared to be directly related to the amount of diazepam previously self-administered. For instance, monkeys which did not initially have high rates of responding for saline showed increases in responding after additional exposure to diazepam. Furthermore, the one monkey with low diazepam self-administration rates also had low rates of responding for saline. However, following a period of cocaine self-administration, responding declined in all monkeys when saline was substituted for cocaine. The data suggest that diazepam self-administration affects responding under extinction conditions, an effect which makes the interpretation of diazepam's reinforcing properties difficult.
KW - Cocaine
KW - Diazepam
KW - Drug self-administration Monkeys
KW - Extinction
KW - Reinforcing efficacy
KW - Response perseveration
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U2 - 10.1016/0091-3057(87)90016-5
DO - 10.1016/0091-3057(87)90016-5
M3 - Article
C2 - 3659109
AN - SCOPUS:0023226697
SN - 0091-3057
VL - 28
SP - 81
EP - 86
JO - Pharmacology, Biochemistry and Behavior
JF - Pharmacology, Biochemistry and Behavior
IS - 1
ER -