Hello, I have been on 300 mg venlafaxine for a few years now. I wake up with bad vertigo approx once or twice a month, does anyone else? Is it a known side effect of Venlor? I get very nervous trying to research this type of thing on the net, I'd rather hear it from people in the same boat. I suffer from chronic depression and PTSD but it's been very much under control with Venlor and some other medication I am taking. I'm not sure whether this side effect is from Venlor, other tabs I am on or the combination. If Venlor, does anyone know the reason for this side effect?