your doing good!! I also take phentermine........my first month I lost 17 pounds, the 2nd month only 4!!! its appetite suppressant, it also gives you energy......roll with it!! my advice for you- keep doing what your doing!! eat healthier, change your work out from time to time,& keep drinking water!!!!

I wanted to add to follow this post as more comments may roll in. I am newly on Phentermine. I spent 4 weeks on a 15mg. prescription and lost 2 lbs. I'm now beginning 30mg. (1.5 weeks now) and have lost another 2 so far, although it's been fluctuating a little. When I began, I read online to expect all of these different things- dramatic weight loss, sleepless nights, tons of excess energy,.... I have none of that. I've noticed the appetite suppressant (to the point where I feel sick to my stomach and just don't want to eat), and I've noticed that I have a lot more stamina when I am working out - I can do more.
I know it's slow going, and not to expect miracles.... logically, I know this. But dammit, I was hoping!

I am on phentermine and this is the 2nd time I am going on it. (you can follow my experience at phenfatty.blogspot.com)
I have to ask if you got the phentermine from a reputable doctor? I believe that online orders or hole-in-the-wall weightloss clinics that give out phentermine seem to dilute the pills. Maybe they're just caffeine, I don't know, but they will not have the same affect as the REAL phentermine.