I have used Xenadrine in hopes of shedding some bodyfat,and i had great results with it. Took 2 pills at 6am with a multi vitamin,and 2 pills at noon with a multi vitamin. Had my diet,cardio,and weight training in place, and i lost 14 pounds my first month. Again different people react better to different things, my partner followed the same thing i did and Xen's didnt do much for him, for me they speed me up. Some side effects i had included dry mouth and lips, and a little restlessness, nothing major. Sense of well-being throughout the day. Didn't take any on sat or sun.