I have just gone off of Effexor XR after taking it for a little over a year. I hate to say it but I was relieved to see that someone else is experiencing numbness in the facial area. I am experiencing numbness on the right side of my mouth exactly as you stated. It feels like I\'ve just been to the dentist and had a novacaine shot. I\'m also experiencing dizziness, shortness of breath and heartburn. I started searching the web to see what side effects other people have experienced because this is starting to freak me out. Thanks for sharing.