I have OCD and depression and have been diagnosed with Personality disorder, and I suffer from paranoia as well and severe agitation. I am taking Effexor (venlafaxine) and zyprexa (Olanzapine). When I started the Olanzapine, I experienced massive hunger, and I get very drowsy even now. I am on 75 mg of Effexor and 5 mg of Olanzapine. I have been told I can change to Abilify (aripiprazole) instead of Olanzapine because I am very concerned about the Olanzapine causing diabetes. Is anyone else on Olanzapine and worried about diabetes? Or is anyone else taking an anti-depressant plus an anti-psychotic for similar problems? Richardaddy.