"i started taking phentermine on 10/2, took 1/2 pill for three days and have since been taking full tablet.  i have a history of high bp, but have not noticed much change in that. had initial body fat level of 33. so far have lost 3-4 lbs. side effects are dry mouth, a little nausea, but most irritating and concerning to me is the extreme sweating. i easily get drenched with sweat, with the slightest amount of exertion. tomorrow i&#039;m going back to 1/2 tablet and see if that helps. is anyone else having this side effect and how do you handle it? thanks in advance."