I have Fibro CF I take co codamol and the last two months 10mg nortryptaline. Last week my Dr upped it to 15mg, from this Monday I have been getting blurred vision and even more sensitive to light. I have took it down to 5mg, still off with the vision.And I am more unsteady on my feet then usual. Please can anyone tell me what is going on with me? And I can only walk at a snails pace and very stiffly too.