how long does effexor take to start working?is it like an ssri that take 4 to 6 weeks or longer?im just wondering if an snri would work better for my depression.i dont feel like my doc listens to me sometimes.and if i do change to an snri i will have to taper off of the med im taking now slowley.i hate feeling like this everyday is hell.i just want something to work and fast.thanks anymore info will help.