NCIt definition : A natural monoamine alkaloid derivative and a sympathomimetic stimulant with appetite
suppressant property. Phentermine, which was part of the Fen-Phen anti-obesity medication,
stimulates hypothalamic release of norepinephrine, a neurotransmitter involved in
stress responses (fight-or-flight reactions), and reduces hunger sensation. Phentermine
also causes the release of epinephrine or adrenaline outside of the brain, resulting
in breakdown of stored fat.;