It depends on what kind of diet pills you are. Some weight-loss drugs, such as traditional Chinese medicine formula, may have better effect of hot compress, but not all drugs are suitable for hot compress. In fact, it is best to lose weight through exercise.
Or drink some tea to lose weight. Although some diet pills can be effective in a short time, they are easy to cause rebound and have side effects. Please be careful. If you want, I can send you some slimming materials. I wish you success in losing weight.