Hoodia is the popular slimming pill, has been causing some disagreement for its lack of side effects. Hoodia inspires the brain about thinking that you are not hungry. If you forget to take food because you are never hungry, the body will be robbed of nutrients and energy. Hoodia hides thirst. So drinking lots of water especially in dieting is a must because hidden thirst leads to lack of fluids. It is said that Hoodia is not a stimulant, but the green tea or the combination of the two might be the reason of nervousness, jitters, sleeplessness and headaches.  So you can relax about using Hoodia based slimming pills.