Benzphetamine is a sympathomimetic amine and is classified as an anorectic. It has anticonvulsant, anxiolytic, anorectic and amnestic effects in animal studies. Sibutramine (Reductil or Meridia) is an anorectic or appetite suppressant, reducing the desire to eat. The drug has been used as an antidepressant and anorectic. It has anorectic, anxiogenic and pro-convulsant effects. Khat is an effective anorectic, causing loss of appetite. Benzphetamine is an anorectic, primarily promoting weight loss through reduced appetite. Phendimetrazine is an anorectic drug which acts as a norepinephrine-dopamine releasing agent (NDRA). The anorectic effect of PYY could possibly be a future obesity drug. The molecule also loosely resembles ethcathinone, the active metabolite of popular anorectic amfepramone (diethylpropion). It was found to be twice as potent an anorectic as fenfluramine. Pyroglutamyl-histidyl-glycine is an anorectic. Other studies on Y2R-knockout mice have shown no anorectic effect on them. It has also been trialed as an anorectic. Levopropylhexedrine is also used as an anorectic under the brand name Eventin.