In my own personal opinion, effexor shouldn't even be on the market! I was on it for 3 years. If I missed even one dose, I got horrible "brain zaps". When I had to stop taking it due to pregnancy, it was the hardest thing I've ever had to do!!! You can't even wean yourself off without the brain zaps and vomiting. At least in my case, and I read the same thing about other people. Literally can't just move your eyes to look at something, turn your whole head or you'll feel the electric jolt! Anyways, it was a nightmare. I don't recommend effexor.