"i have been on and off phentermine since 2009, and i always have great results. i have a terrible binge eating condition and unbearable sugar cravings. phentermine completely changed my cravings to salads and unsweetened foods. i also have insomnia from hunger and digestion problems. i sleep like a baby on the medication and i find that reading and focusing are much easier. i got the best results working out on an empty stomach and then taking 1/2 pill, then breakfast, then 1/2 pill or whole pill in the evening. again, i sleep better on it. i did develop a slight tolerance after the first year, but taking a break really helped me get the full benefit of the medication and refocus on my diet. the side effects are minimal."