"i&#039;ve been taking phentermine 15mg twice a day for about a week now and have lost about 7 lbs so far. i do feel the dry mouth, a bit of the jitters, feel like i don&#039;t have a full night&#039;s rest. the oddest sensation has been anxiety while driving. i didn&#039;t see anyone report such a feeling but i&#039;ve never had any issues behind the wheel ever before. i would like to continue on my goal and will give it another week or so. if anyone has had this occur to them before please share. good luck to everyone."