Hi Cassandra and welcome
my son is anaemic (not related to his TS, but to his Crohn's disease) and the only iron supplement that he seems able to tolerate is Solgar's Gentle Iron...this may be because of his sensitive GIT system related to the Crohn's...
We have had tremendous success with a natural treatment protocol that my son has been following for 6 years now. He did have very severe TS and OCD, but things are now really mild and manageable. I have written about it here
http://neurotalk.psychcentral.com/showthread.php?t=1144
There is also a lot of useful info on TS in our useful websites link above
http://neurotalk.psychcentral.com/showthread.php?t=681
hope you find the answers you are seeking