I was on two at once but one is PRN. I took Abilify daily to treat and prevent psychosis but Hadol, a stronger anti-psychotic, was added once I started hearing distressing voices. I still have the Haldol PRN but haven't needed it in months. I no longer take the Abilify as once I became well, I was adamant that I be weaned off of most of my 7 medications. My pdoc obliged and even concurred. It was maybe the greatest thing that has happened to me in recent history as I not only remained well but also gained so much energy and awareness.