[Various considerations concerning butorphanol].
D002077:Butorphanol / Q000009:adverse effects; D006801:Humans; D009019:Morphinans / Q000009:adverse effects; D012131:Respiratory Insufficiency / Q000139:chemically induced; D019966:Substance-Related Disorders
D009019:Morphinans; D002077:Butorphanol
Algunas consideraciones sobre el butorfanol.