sjbmom,
Tics can come and go during developement. They were thought to be made worse by stimulant meds, but studies have shown this is not the case (although the statistics for studies do not give a definitive result, but a tendency). Tics do not automatically mean you stop stimulant meds. It may mean a med change or addition of guanfacine (Tenex) to help control the tics and keep the stim dose down to a minumum. There are some good threads on tics:
http://www.adhdnews.com/forum/forum_posts.asp?TID=25554& PN=1
http://www.adhdnews.com/forum/forum_posts.asp?TID=25462& PN=3