Nadine was in a feverish state that was half-euphoria, half-terror.
King, Stephen
The Stand
He felt again that rush of controlled euphoria, that heady sense of purpose in destruction.
J. K. Rowling
Harry Potter and the Deathly Hallows
Hazel tried to settle her stomach by thinking of pleasant things—the euphoria she’d felt last night when they’d won the war games, riding Hannibal into the enemy keep, Frank’s sudden transformation into a leader.
Rick Riordan
The Son of Neptune
None of this is to say we experienced constant euphoria.
Frank Herbert
Chapterhouse: Dune