title: Modification of morphine analgesia by labetalol.
mesh_terms: D000698:Analgesia; D000818:Animals; D004983:Ethanolamines / Q000494:pharmacology*; D005260:Female; D007741:Labetalol / Q000494:pharmacology*; D008297:Male; D009020:Morphine; D051381:Rats
chemical_list: D004983:Ethanolamines; D009020:Morphine; D007741:Labetalol