Delayed respiratory depression following repeated intrathecal low dose morphine.
D006801:Humans; D007278:Injections, Spinal; D008297:Male; D008875:Middle Aged; D009020:Morphine / Q000008:administration & dosage / Q000009:adverse effects*; D012131:Respiratory Insufficiency / Q000139:chemically induced*
D009020:Morphine