Did you have this problem? I believe I took too large of a dose. I have had visual problems and went to optometrist and he said he believes my eyes are fine but if I had neuritis that it may be possible he can't see it. I feel naucious and dizzy especially driving when it's dark. I feel like I am getting better but then it comes back. I have been taking an anti-infammatory NSAIDs and vitiman b12 twice a day (1,000 mg x2) as directed. Basically I would like to know if this gets better and if it does or did for you what did the first couple of weeks look like for you?