"i&#039;ve been taking bontril sr (105 mg) for 30 days. the 1st week i lost 7lbs and the 2nd week i lost 3 lbs and none since. the 1st week i had tons of energy and a significant decrease in appetite. the 2nd week my appetite started to come back and the energy was gone. i now have almost the same appetite as before, although i do get full a little quicker. went to doctor today to get refill. going to try 1 more month. i did follow the 1200 calorie diet and drank lots of water the 1st 2 weeks. it is hard to restrict calories now that the hunger is back. as far as side effects, i did experience headaches, insomnia and dry mouth for a few days, but that has gone away. i was also irritable that 1st week. now the only side effect is dizziness if i don&#039;t drink enough water."