Antagonism of morphine towards 5-hydroxytryptamine.
D000959:Antihypertensive Agents; D006801:Humans; D009020:Morphine / Q000494:pharmacology*; D012701:Serotonin; D012702:Serotonin Antagonists
D000959:Antihypertensive Agents; D012702:Serotonin Antagonists; D012701:Serotonin; D009020:Morphine
MORPHINE/effects; SEROTONIN/antagonists