2. Diarrhea medicine makes you go out before you absorb what you eat, which is equivalent to not eating it.
3. Neurodisruptors make you lose your appetite and eat nothing, which is equivalent to not eating.
4. Nerve stimulant You did eat something, but you were inexplicably excited, your heart beat faster and you couldn't sleep. The side effects are too great.
These are all at the expense of your health. You can lose weight in a short time, but you can't keep eating. Malnutrition will kill you.
The best thing is to exercise to lose weight. You are healthy, athletic and easy to lose weight.