levallorphan tartrate

lev·al·lor·phan tar·trate

(lev'ă-lōr'fan tar'trāt),
The N-allyl analogue of levorphanol, antagonistic to the actions of narcotic analgesics; used in the treatment of respiratory depression due to overdosage of narcotics.

levallorphan tartrate

(lĕv″ăl-lor′făn)
A narcotic antagonist used to counteract morphine or opioid-induced respiratory depression.