title: Interaction between delta 9-tetrahydrocannabinol and morphine on the motor activity of mice.
abstract: The present experiments dealt the effects of delta 9-tetrahydrocannabinol (THC) on the locomotor activity stimulating action of morphine in mice. In the first series of experiments, the pretreatments of mice by THC in doses up to 20 mg/kg have been found to potentiate the morphine-induced hyperactivity in dose-dependent manner, but higher doses of THC did not produce such an action. In the second series of experiments the dose-response curve of morphine for the motor activity has been found to shift to the left by the pretreatment of mice with 10 mg/kg of THC. These results show a synergism between morphine and THC and suggest that both drugs may share some common site of action.
mesh_terms: D000818:Animals; D013759:Dronabinol / Q000494:pharmacology*; D004347:Drug Interactions; D008297:Male; D051379:Mice; D009020:Morphine / Q000494:pharmacology*; D009043:Motor Activity / Q000187:drug effects*; D013997:Time Factors
chemical_list: D009020:Morphine; D013759:Dronabinol