Use of levorphan tartrate for relief of postoperative pain; preliminary report.
D006801:Humans; D007981:Levorphanol; D009022:Morphine Derivatives; D010146:Pain; D010149:Postoperative Pain; D013644:Tartrates
D009022:Morphine Derivatives; D013644:Tartrates; D007981:Levorphanol
MORPHINE/derivatives; PAIN