Abstract
Four groups of rats differing in the number of periods of prior exposure to morphine sulphate in the i.v. self-administration paradigm were studied under conditions of narcotic blockade. Three groups of subjects also differing in the amount of prior exposure to morphine sulphate were studied under saline conditions. At effective blocking doses of naloxone, opioid-seeking behavior was eliminated in relatively drug naive animals, whereas the persistence of secondary reinforcers in rats with longer addiction histories served to maintain opioid consumption in the presence of adequate pharmacological blockade. Data from saline-treated animals were very similar to data obtained in naloxone-treated animals. The authors conclude that at adequate blocking doses of narcotic antagonist the length of addiction appears to be the best predictor of opioid consumption.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 67-71 |
| Number of pages | 5 |
| Journal | Psychopharmacology |
| Volume | 54 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1 1977 |
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All Science Journal Classification (ASJC) codes
- Pharmacology
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Narcotic blockade, length of addiction, and persistence of intravenous morphine self-administration in rats. / Carnathan, Gilbert; Meyer, Roger E.; Cochin, Joseph.
In: Psychopharmacology, Vol. 54, No. 1, 01.01.1977, p. 67-71.Research output: Contribution to journal › Article
TY - JOUR
T1 - Narcotic blockade, length of addiction, and persistence of intravenous morphine self-administration in rats
AU - Carnathan, Gilbert
AU - Meyer, Roger E.
AU - Cochin, Joseph
PY - 1977/1/1
Y1 - 1977/1/1
N2 - Four groups of rats differing in the number of periods of prior exposure to morphine sulphate in the i.v. self-administration paradigm were studied under conditions of narcotic blockade. Three groups of subjects also differing in the amount of prior exposure to morphine sulphate were studied under saline conditions. At effective blocking doses of naloxone, opioid-seeking behavior was eliminated in relatively drug naive animals, whereas the persistence of secondary reinforcers in rats with longer addiction histories served to maintain opioid consumption in the presence of adequate pharmacological blockade. Data from saline-treated animals were very similar to data obtained in naloxone-treated animals. The authors conclude that at adequate blocking doses of narcotic antagonist the length of addiction appears to be the best predictor of opioid consumption.
AB - Four groups of rats differing in the number of periods of prior exposure to morphine sulphate in the i.v. self-administration paradigm were studied under conditions of narcotic blockade. Three groups of subjects also differing in the amount of prior exposure to morphine sulphate were studied under saline conditions. At effective blocking doses of naloxone, opioid-seeking behavior was eliminated in relatively drug naive animals, whereas the persistence of secondary reinforcers in rats with longer addiction histories served to maintain opioid consumption in the presence of adequate pharmacological blockade. Data from saline-treated animals were very similar to data obtained in naloxone-treated animals. The authors conclude that at adequate blocking doses of narcotic antagonist the length of addiction appears to be the best predictor of opioid consumption.
UR - http://www.scopus.com/inward/record.url?scp=0017741118&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0017741118&partnerID=8YFLogxK
U2 - 10.1007/BF00426544
DO - 10.1007/BF00426544
M3 - Article
C2 - 410062
AN - SCOPUS:0017741118
VL - 54
SP - 67
EP - 71
JO - Psychopharmacology
JF - Psychopharmacology
SN - 0033-3158
IS - 1
ER -