Hi,

Honestly, there is no quick way. An unhealthy way is to take a diaretic, but you will lose only water, not fat. That is a temp. fix.

As far as medication, there is only one which is called Orlistat. It inhibits the enzyme that breaks down fat, so this will allow fats to pass through you. Other than that, the other diet aids are false, or caffiene-based. In that case, drink coffee.

The not eating rice at night is good advice. Remember, it is down to physics: when you eat about 7500 more calories than you burned, you gained a kg. the same is true for losing it.