"i started phentermine two months ago (mid-jan 2014) and i have lost 25 pounds (almost 26) so far. working out is a challenge with my kids so i just try to walk whenever i can. i mostly monitor my caloric intake to make sure i eat enough to avoid my body&#039;s starvation defense mode, because that would defeat the purpose. i usually do the protein meal bars for lunch or breakfast shakes and then a sensible dinner. only discomfort is the occasional constipation when i don&#039;t drink enough water. but usually the dry mouth is enough incentive to drink as much water as possible. also i completely eliminated soda and other caffeine sources which i believe helps avoid the risk of heart palpitations."