Okay, so since June up until three weeks ago I was on Axit (Mirtazapine) 15mg, but didn't like how I was relying on it to deal with my insomnia nor how fast I gained weight. I brought it up with my doctor Tuesday and she's now put me on Efexor 150mg. Not knowing how it would react with my body, I took it at lunch time today which was 7, going on 8, hours ago. I've been fighting off sleep, my hands have started shaking this past hour, my teeth are chittery and I just don't feel all that awesome. I know, first day, new medication etc etc but I've never had side effects like this before. Like I'm barely staying awake but I have to or I'll wake too early tomorrow. Does anyone have any information on this medication for me?