After previously trying five different antidepressants over the past three years nothing worked. My GP has now put me on extended release Venlafaxine three days ago. I’m currently taking straight after my evening meal. First night I didn’t go to sleep at all. Just lay in bed tired but not sleeping. Next morning I suddenly had a terrible hot sweat. Next night I slept four hours waking at two am. Last night I slept five hour but when I tried getting out of bed I was very dizzy. I couldn’t walk. I suffer with Postural Hypotension so dizziness is a big issue. But I feel the Venlafaxine is making my dizziness worse. I know I have to give it time but wondering what initial side effects have people had with Venlafaxine? How long did it take to notice an improvement in anxiety? Sorry it’s a long post.