It contains sibutramine. Most diet pills are like this. Do not take it. The damage to liver and kidney is super great. I have taken thousands of diet pills (including Qumei, Jiedu Yang Yan Capsule and many miscellaneous brands). I lost weight, but I bounced back immediately, and it was harmful to my health (obviously). A friend of my mother died after taking diet pills, and I vowed never to take them again in my life. Now it's a light diet combined with a gym.