I was on 15 mg Abilify and 36 mg of Concerta had to go cold turkey when I couldn't afford it anymore. Didn't notice any side effects at all. Made me wonder if they were ever really doing anything. But I've quit MULTIPLE meds cold turkey over the years and other than an upswing of depression never noticed any side effects. I do tend to be med resistant so maybe I'm side effect resistant to lol.