I was on venlafaxine for a good 18 months up until about 5 weeks ago. I've now gone back to fluoxetine.at first the ven helped me a lot but after a year or so my insomnia came back so I went back to the fluoxetine which was the first antidepressant I was put on,I've pretty much been thru all the ssri's and snri's + mirtazapine at some point.I found venlafaxine and fluoxetine to be the most beneficial. But every one is different