we made localized bilateral injections of naloxone hcl , 1.5 mug/rat , into 60 subcortical sites of the pentobarbital-anesthetized , morphine-dependent rat and found that two circumscribed areas of the brain , the medial hypothalamus and the periaqueductal-4th ventricular spaces , were selectively sensitive to naloxone-precipitated shaking .
C0700549
naloxone hcl
C0027358
naloxone