Pristiq
"I'm 22, and my doctor changed me from Effexor to Pristiq for my OCD and OCPD. Most noticeable side effect is definitely the appetite loss, but I don't seem to be losing much weight thankfully. If I'm busy and don't think about it, I go all day without food- it's nuts. Also I am having a lot of headaches, but I cannot be sure its the medicine. I sweat A LOT on this, and if I take it too late in the day I cannot sleep. My OCD seems to be in check- much better than Effexor. I've been taking 50 mg for 5 months now."