First of all, if you intend to control your appetite in a safe way, do not use harmful appetite suppressing pills such as Proactol, Chitosan, Reductil, Meridia, Phentermine, Xenical, Alli, and other medications as they can be very unhealthy and even dangerous. Those anorectic drugs usually suppress hunger by reducing secretion of epinephrine and norepinephrine (noradrenaline) that stimulate our appetite. The following negative effects are usually the result of using those drugs: insomnia, nervousness, high blood pressure and increased heart rate, restlessness, headache, blurred vision, etc. Read more