I have been using Saxenda for 3 weeks and have lost 5kgs so far. The only side effects I have experienced are thirst and tiredness. I only use 1.2mg daily at this stage as I have no appetite. I will increase it to 1.8mg if my appetite comes back. The only drawback is the expense but worth it if I reach my goal weight loss of 15kg. I am concerned that I will gain weight as soon as I stop the Saxenda.