Suppressant is a drug that suppresses appetite.
Appetite suppressant is also known as anorexigenic. Is a dietary supplements or drug which reduces craving, food consumption, and causes weight loss. Appetite suppressants are better than any medication because they do not produce any side effects.
Benzphetamine, dexmethylphenidate, glucagon, methylpenidate, phendimetrazine and phenethylamine are other compounds marked as appetite suppressants.
Reference:
http://en.wikipedia.org/wiki/Appetite_suppressant#List_of_Anorectics