Continuous intrathecal administration of morphine via an osmotic minipump in the rat.
D000818:Animals; D002555:Cerebrospinal Fluid; D002946:Cisterna Magna; D004361:Drug Tolerance; D007278:Injections, Spinal / Q000295:instrumentation; D008297:Male; D009020:Morphine / Q000008:administration & dosage*; D051381:Rats; D011919:Rats, Inbred Strains
D009020:Morphine