Wow Roo.... that is a long time to be on a medication. Unless a medication specialist exists here, I would maybe seek one out in your community and see what they have to say. You can always find an expert in every area of medicine and mental health, you just have to look a little usually. I think someone who specialises in medication could give you a pretty good scope and idea of your question though. Would love to hear your feedback though if you do seek such specialist out about your specific request.