My doctor gave me a sample of Viibryd to try for my depression and I am cautiously optimistic. I've only been on it for a few days, but feel better than I've felt in years! I'm worried that after a while it will stop working for me, like Prozac did. I would love to hear from someone that's been on it for 6 months or longer. It is so wonderful to feel like my old self, I just wonder if it will last.