"the first time  i  used phentermine,  about 6 months ago. i ended up in the er with chest pains. should have read all side effects.  decided to give it another shot since it does help a great deal with weight loss.  i now take half of the pill and its working much better. do have dry mouth, sleepiness maybe an hour after taking it and some mood swings.  i will deal with the side effects so that i may get at least 25 pounds off."