bipolar disorde
"Abilify is not for everyone. I experienced severe personality change within a month. The story:  I have had bipolar disorder since I was 13 and have been in treatment for 9 years. When Abilify came out, we tried Abilify to "bridge" getting me off atypical antipsychotics and onto a mood stabilizer. 
The 20 day experience was horrible. My personality changed radically. I didn't know myself anymore. Friends, my lover, my boss, all begged me to stop. I felt weird on it, not better. Severe personality changes are possible with Abilify. I called my psych, we stopped the medicine and moved onward. Those 20 days were destructive, but my friends & job were kind and life returned to normal."