title: The attenuation of delta 9-tetrahydrocannabinol and morphine of the quasi-morphine withdrawal syndrome in rats.
abstract: The effect of delta 9-tetrahydrocannabinol (THC), morphine, haloperidol and chlordiazepoxide on the exhibition of the signs of the quasi-morphine withdrawal syndrome was studied in rats. In preliminary studies approximately equi-sedative doses of these drugs were chosen. Morphine and THC produced a very similar degree of suppression of the signs of the quasi-morphine withdrawal, but unlike morphine, the effects of THC were not reversed by the narcotic antagonist, naloxone. The dopamine receptor antagonist, haloperidol, produced a moderate suppression of the withdrawal syndrome and chlordiazepoxide was without significant effect. It is concluded that THC is of very similar potency to morphine in suppressing the quasi-morphine withdrawal syndrome, but its activity in this regard does not appear to be dependent upon the availability of opiate or dopamine receptors, nor is it due to sedation alone.
mesh_terms: D015056:1-Methyl-3-isobutylxanthine / Q000494:pharmacology; D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects; D002707:Chlordiazepoxide / Q000494:pharmacology; D013759:Dronabinol / Q000494:pharmacology*; D006220:Haloperidol / Q000494:pharmacology; D006801:Humans; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D009021:Morphine Dependence / Q000523:psychology*; D009270:Naloxone / Q000494:pharmacology; D051381:Rats; D013375:Substance Withdrawal Syndrome / Q000523:psychology*
chemical_list: D009270:Naloxone; D002707:Chlordiazepoxide; D009020:Morphine; D013759:Dronabinol; D006220:Haloperidol; D015056:1-Methyl-3-isobutylxanthine