Pregabalin - Can you be on this for life ?

I am on pregabalin and have been for 6 months. I was on 3 x 150mg per day, now down to 2 x 150mg per day. I went down to 1 x 150mg per day and then came off for a few days, but the mornings were horrible for me, so back on. I must admit most of the time i feel better on it. I went on due to potential neuralgia, I also get anxiety from time to time. My question is can i stay on pregabalin forever? I know it is used for epilepsy so my presumption is that it can be used forever?