Influence of nalorphine upon the synergistic effect of methyldopa and ergonovine on morphine analgesia.
D000818:Animals; D004357:Drug Synergism; D004874:Ergonovine / Q000494:pharmacology*; D005260:Female; D008297:Male; D008750:Methyldopa / Q000494:pharmacology*; D009020:Morphine / Q000494:pharmacology* / Q000627:therapeutic use; D009269:Nalorphine / Q000494:pharmacology*; D010146:Pain / Q000188:drug therapy; D011335:Proadifen / Q000627:therapeutic use*; D051381:Rats
D008750:Methyldopa; D009020:Morphine; D011335:Proadifen; D009269:Nalorphine; D004874:Ergonovine