It will last until you stop taking the medicine. As long as you take it, you will always feel this way. Chest tightness, palpitations, dry mouth and insomnia will also change greatly and become very sensitive. However, the effect is also the most effective among many diet pills. At that time, I persisted for a month and lost more than 20 kilograms. I suggest that you must pay attention to the later maintenance after losing weight this time. Diet pills are too harmful to your health to take for a long time. .