Cox, B M Acute tolerance to narcotic analgesic drugs in rats. [electronic resource] - British journal of pharmacology and chemotherapy Jun 1968 - 245-56 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0366-0826 Standard No.: 10.1111/j.1476-5381.1968.tb00986.x doi Subjects--Topical Terms: AnalgesiaAnalgesics--pharmacologyAnimalsDactinomycin--pharmacologyDrug ToleranceFemaleHeroin--pharmacologyInjections, IntravenousMaleMeperidine--pharmacologyMorphine--pharmacologyNarcotics--pharmacologyRats