Hi, about a week ago I switched from Zoloft 150mg a day to effexor 75mg once a day at night. I was on Zoloft for almost a year. My question is will the Effexor start working faster because I was already taking an antidepressant? It's been about a week since starting Effexor and I do feel some improvements? Wondering if it's just a placebo effect or actually starting to work. Also I didn't taper down from zoloft, I just switched to effexor.