i take a full tranquilizer dose...no major problems, as long as i take my antioxidants and b-vitamins with it...drop those, i get stiff gait/walking (not -quite- Thorazine Shuffle, but...not good, either....). its a tolerability issue.
lots of people swear by low doses. id still see about an AIMS Test (for TD) every 6 months, at least 1x annually...
and blood work, because now and then lipids and blood sugar get messed up. other than that, try not to worry too, too much. :-)