"i have been on and off of phendimetrizine 35 mg for three years. the first 2 months i ever took them i lost 50 pounds. until the past year i had a great experience with it... although i would yo-yo if i came off the pills and diet, they were extremely effective while doing it correctly. i would strongly recommend never combining the pills with alcohol, too much caffeine, or cigarettes. the last year has actually driven me to be very hesitant to use the medicine. i am truly nervous of having a heart attack. i became very nervous, anxious, experienced high blood pressure, and heart palpitations. it&#039;s scary. just be very careful because you will eventually think you need these pills to lose weight, and that is terrible. be careful!"