By takin eltroxin when you don't need it will cause a heck od a lot of problems!! You could end up hyperthyroid and thats worse than being over weight! Do not take them if you don't have a thyroid problem, you will regret it if you do... You dont want to be going through what people on in this community are... Its hell, I wish I didnt have a thyroid problem...... Please listen to Stella and I!
You will lose function of the gland and do permanent damage to yourself.
I can't go into much more with you on this because I believe I may fall into a rant on your question.
You need to realize that you are healthy and to lose a few pounds with a prescription like this could change your life forever.