How can I lose 18 pounds in 4 days?

It is improbable to 18 lbs in 4 days, but not impossible. The question is, is it safe. If you were to even lose 18 lbs in 4 days it would have to be all water weight, you could not lose that much fat in the shirt amount of time. Here is a website that you may use as a guideline for quick water weight loss. http://www.everydiet.org/diet/3-day-diet