I'm taking phentermine now for weight loss. I've only been taking it for about 4 days now, it does make you speed around like crazy, your heart races, it's hard to sleep at night, but it does curve your appetite a bit. I had to get a stress test before getting a prescription because it does raise your blood pressure. I'm only taking them to move forward on my GBP journey. But Be warned they are for SHORT TERM ONLY! My doctor says 2-3 Months the most. I'll update the results after. Good luck!