I took 100mg of Pristiq last year for two months. While I found it helpful for my depression, I had a hard time dealing with the subsequent sexual dysfunction. It basically destroyed my ability to have the big O, and eventually I decided I couldn't handle that anymore, so I asked to be pulled off.

I also had some blurred vision on Pristiq, while went away after a few weeks.

Anyways, you may or may not get these side effects. Good luck with it!