Hello, I understand your concern. Yeduc contains Sibutramine which is not considered an illegal drug or substance. This said, I do not think you should be concerned about this drug showing on the tests. In any case, it would take Sibutramine aywhere from 48 to 74 hours to clear from the system, depending on your body mass and metabolic rate. Hydration also speeds flushing of the substances out of the system. It should be notes also that Yeduc diet pills are also associated to a long list of side effects such as headaches, anxiety, back, chest and stomach pain, neck pain, flu symptoms, mood changes and so on. I recommend you stop this medication immediately as soon as you experience any pain or anything unusual in the way you feel or behave. The healthy eating and active lifestyle are always the best ways to lose weight. I hope this helps. Wishing you all the best.