Venlafaxine is a very effective AD. Like all of them, it has side effects, particularly at first (though these should dial down with time). It's also got a wide range of doses (37.5mg through to 375mg) so finding a dose that works should be doable. The main issues with venlafaxine are particularly strong withdrawal effects when/if coming off them, which means it's a slow process if you need to stop them, and the withdrawal effects can start very quickly so missing even one dose can make you feel pretty rough.
Bearing all this in mind, I've been on venlafaxine for years and it suits me well
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