Any methamphetamine based stimulant would be good. Speed up the metabolism and keep you from getting hungry. Best way would be to get a prescription. Downside being the addiction and stress on the body, but I'm guessing you don't really care about being healthy, just quick weight loss?
If you want to be healthy, there is no quick way. Healthy diet and plenty of exercise.

for rapid weight lost please becrefull that you are no do instant weigh lost because you will get big problem in future, instant weigh lost must be get big effek.
you should do with slowly because when you get ebesitas / fat no also instant but you increse weight days by days.
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just eat oatmeal:
a proof is that:
Breakfast cereal health benefits
There has been increasing interest in oatmeal in recent years due to its beneficial health effects. Studies have shown that daily consumption of a bowl of oatmeal can lower blood cholesterol. After reports found that oats can help lower cholesterol, an "oat bran craze" swept the U.S. in the late 1980s, peaking in 1989. The food fad was short-lived and faded by the early 1990s. The popularity of oatmeal and other oat products again increased after the January 1997 decision by the Food and Drug Administration that food with a lot of oat bran or rolled oats can carry a label claiming it may reduce the risk of heart disease, when combined with a low-fat diet. This is because of the beta-glucan in the oats. Rolled oats have also long been a staple of many athletes' diets, especially weight trainers', given oatmeal's high content of complex carbohydrates and water-soluble fiber which encourage slow digestion and stable blood-glucose levels.

The fat loss 4 idiots book is a great tool for any dieters. Its tell you what to eat and when to eat. To maximize your metabolism. Not to mention anyone can do this diet. This diet is easy to follow and easy to stay on.
To learn more visit
http://thefatlos4idiots.blogspot.com/

It's extremely unhealthy, but:
chewing gum
drinking LOTS of water
eating fiber rich veggies like celery and carrots, no dip
lots of soup
keep in mind, you'll always be hungry... but you have to learn to ignore it.

eat protein, like steak and pork, and make sure you lift and run alot. a good way to lose weight is run. get up at like 5am and run a couple miles. do this every day for a couple of weeks

Dont starve your self, unless you have death wish, yeah it works but its not healthy. Eat right minimize your sugars, drink water, and excercize! thats the only healthy way to do it.

seriously starve and workout, don't eat.
it's the only thing that works for me.