I took effexor xr for about 3 years, and I abruptly stopped taking it... and that is something that I do not recommend. This was several years ago but the one thing that I can vividly recall is the changes in my vision. My equilibrium was off and I felt like I couldn't stand up straight. This lasted for a couple weeks but I struggled through it. Technically a doctor should take her does down gradually and that should prevent any side effects. I don't recall being verbally and physically abusive while taking it, but medications affect different people in different ways.