MY Father Suffers From Sczihophrenia And He Is Currently Being

MY father suffers from sczihophrenia and he is currently being administered resperdal consta deep im 37.5mg injection and text2,kividol1.5mg.But inspite of taking this medicine he had acute depression in which he looses control over himself from FEB2014 to AUG 2014 and again now in dec the problem has relapsed inspite of regular intake of medicine.Earlier he took DIVAod 500mg ,olimate 10mg and he was good for 2 yrs ..should we return back to these medicines after consulting the doctor or we should continue with the present course.Whether DIVAOD 500mg is more effective than resperdal consta.pls do reply