I think the dosage amount depends on your symptoms. I have psychosis and mania if I don't take an anti-psychotic medication. If you are taking aripiprazole for depression though to maximize the effects of your anti-depressant medication, then a low dose makes sense. I don't take any anti-depressant and only take brand Abilify. I have schizoaffective disorder and need an anti-psychotic to prevent psychosis from occurring. I also have bipolar and my mania is alleviated by the medication. For my illness, 10-15mg is an average dose. If I took only 5 mg, I would still have symptoms. I take 12-15 mg daily. At this dose, I feel relatively stable.