Assertion: barbiturate's duration | /r/SimilarTo | pentazocine
Facets:
value: in postoperative studies
type: LOCATION
Source sentences:
text: In postoperative studies, the duration of analgesia with IV or IM butorphanol was similar to morphine, meperidine, and pentazocine when administered in the same fashion at equipotent doses (see Clinical Trials).