What does "levallorphan" mean?

An opioid antagonist from the morphinan family.

What is a synonym for "levallorphan"?

Common synonyms include: lorfan.

noun

noun ·Rare ·Advanced level

Noun

1
An opioid antagonist from the morphinan family. uncountable
2
drug (trade name Lorfan) that is related to morphine but that counteracts the respiratory depression produced by morphine poisoning but without affecting its analgesic effects wordnet

From lev- + all(yl) + -orphan (“morphinan derivate”).