I was on a 225mg daily dose of Effexor for about two weeks before I started to ween myself off because it was doing nothing for my situation, causing ridiculous dehydration, and possibly causing mood swings. I haven't taken any for just over a month and every day I'm still getting the same extreme light-headedness that I got the first time I missed a dose. I have no idea how long this is going to last, and I'm sick of it.
I urge anyone who is researching this medication and considering starting it to reconsider. Tell your doctor you would rather try something different first.