hi. i was on 30mgs for years. i was able to drop a psych drug for depression, and the shrink reduced the abilify to 20mgs at the same time. that was kind of a big cut, all at once...it worked out OK, no major problems, but...personally, I'd recommend a slow, gradual taper. I think the current recommendation is a 10% dosage reduction every month or so, which seems...reasonable.