I would talk to your doctor and make the decision with him or her.
My doctor said I could come off them after 6 to 12 months if I was feeling okay but he said they're safe enough nowadays to stay on them permanently. I'm terrified to go back to the way I was feeling so I've made a decision to stay on them. They don't hurt me and I feel fine on them. I would rather be happy on them than sad off them.
Hope this helps a bit. I thinks its a personal choice everyone has to make based on their person experience and side effects.