The story
Probably from d(ihydr)ox(y) + e(thyl) + f(luoro)- + -azepam (“diazepam derivative”).
Etymology from Wiktionary, CC BY-SA 4.0.
doxefazepam
Today it means: A benzodiazepine derivative drug with anxiolytic, anticonvulsant, sedative and skeletal muscle relaxant properties, used therapeutically as a hypnotic. Full definition →