An anorectic (or anorexigenic) drug.    From Wordnet, Princeton University. 

Acomplia is a diet pill is a sympathomimetic amine and is known as 'anorexigenic' or 'anorectic' drug too.    From Wordnik.com.  [MyLinkVault Newest Links] Reference

However, animals who are fed amounts of food comparable to those eaten by animals submitted to the anorexigenic.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

Ghrelin is a hormone secreted by the stomach which is often viewed as the appetite stimulant that counteracts leptin's anorexigenic effect.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

We have also assessed behavioural and cell-signalling responses to exogenous leptin and the density of immunoreactivity for orexigenic and anorexigenic peptides in the hypothalamic paraventricular nucleus (PVH) prior to the onset of hyperphagia.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

"Our unique genetic mouse models have revealed that POMC neurons are physiologically important targets of potent anorexigenic 5-HT compounds such as d-fenfluramine to suppress appetite.    From Wordnik.com.  [Health News from Medical News Today] Reference

It is generally utilized as an "anorectic" or an "anorexigenic" drug.    From Wordnik.com.  [Wii-volution] Reference