I just started taking Phentermine 5 days ago and already lost 5 pounds and feel wonderful, except for the constipation. And I wonder how am I loosing weight if I can't poop. Any suggestions on how to get back my regularity? I want to continue taking the phentermine, because it does work I just need something to negate the constipation. I want to hear from others who have taken Phentermine and had the same problem and what they did to become regular again. And I am drinking A LOT of water so that's not the problem.