I can't wait. I've been on SSRI's (now on 3rd) since Jan. and it's July. This third one of been on 9 weeks, Prozac, and just begged my pdoc to up it from 20 to 40 mg as I've felt no effect. I'm desperate. Today was told I have to wait 90 days for an SSRI to take effect. Really? That's a long time to wait. I have no hope for these SSRIs.