fen-phen /fɛnfɛn/ noun1 •A combination of the drugs fenfluramine and phentermine, formerly prescribed for weight loss.It is hard to recall the last time a drug so excited the general public. Fen-phen in the 1990s, maybe? Viagra or Botox in the 2000s? Each had amazing hype cycles but none as explosive as Ozempic. — 2023