[stefanie_25]

Hi all. I am new to this site. I do not know of anyone taking phentermine so after searching the web for some info i thought I would post here and see what help you all have to offer. I started taking phentermine 30 mg last year in april 2005. I weighted 238 pounds(the heaviest i have ever been) and by the time july/august came around I had lost like 40 pounds. i felt great and was full of energy and confidence. I was hardly ever hungry and had to basically make myself eat. Well after a few more months the weightloss was slower and finally i felt that they werent working so i stopped using them..and gained back most of the weight. Now I have recently gone back to the dr. and he put me back on phentermine(30mg.) after 2 1/2 weeks i didnt feel anything like i did the first time around with the pills. I was still hungry and lazy. He changed my prescription to 37.5 mg and I have been taking those for almost a week but i really am not feeling anything. How long do these things take to work? could it be that Phentermine will not work for me now because I have taken so much? THanks to all and all advice is appreciated!!

[Susan123]

I felt immediate results. The sharp decrease in appetite for sure, increase in energy.

Its been a few weeks, and the constant thrist is ok as long as I drink A LOT of water, which also means lots of trips to the bathroom. If I don't drink the water, I get a headache.

I have a training coming up where I can't leave for frequent trips to the bathroom, so I went back down to 1/2 pill. I am noticing a slight increase in my appetite, but still working.

I would discuss other meds. with your Dr., if phen is not working for you.

Susan

[rachelrmf]

I was on Phentermine last year for about 5 weeks and went from 178 lbs to 147 lbs. since then (and only because i stopped working out) I gained back up to 156. Or maybe it was my water wieght back because i also stopped drinking my water. Any how shortly after that i got back on the same type of mg and for some reason i did'nt feel like i was even taking anything so after 5 days and still nothing my doc took me off of them and told me that it was just to soon for me to get back on the phentermine because your body builds up a tolerance. so now after about 6 months and diet change and working out and still being the same wieght my doc has put me back on the 37.5 and it is just like the first time i was on them . All the suddon they work again so maybe you did take them for to long and your body has a tolerance for it now.

[stefanie_25]

Thanks to you who replied. I have been taking phentermine 37.5 mg for about 2 weeks now, slight decrease in appetite and a little more energy, but i will wait it out and see what happens. Thanks again and good luck!!