I have been on Saxenda since December 16. I have lost around 18 lbs. At first I felt like it worked, no side effects such as nausea, fatigue etc but got full much faster. In the past few weeks, I don't feel as though it's as effective. I am hungry more often and I'm able to eat a lot more than I should. What gives? Anyone else felt this? If so, did anything work to get the 'feeling' back?