"so i was taking phentermine for a month and lost 15 pounds. i stopped taking it because it cost too much every two weeks to go to doctor and get medication. i googled pills like phentermine and this one came up. the pills look the same except phentermine is smaller. i took half a pill of fastin instead of the whole thing and it feels stronger than a whole pill of phentermine. so if you&#039;re new to this pill i would do only one pill a day and split it in two. it works as an appetite suppressant and and energy booster. i definitely would recommend this. but please take only one pilll a day instead of two and split it in half."