"i was prescribed phentermine 37.5 on april 29, 2016. my dr said to only take half a pill for the first 30 days. i took that first thing in the morning with water. it helped with feeling hungry. the only side effect i had was extreme dry mouth. i just started my 2nd month yesterday, which i will start taking a whole pill but i have noticed i&#039;m feeling hungry more often. i drink 175-200 ounces of water daily, i feel like i cant get enough to drink. i cut out sodas, eat very healthy food and go to the gym 3-4 times weekly. i track my calories on my fitness pal and am always under my daily calorie goal. my starting weight was 233, i weighed in this morning, a month later and i&#039;ve only lost 8 pounds."