Hi and welcome

I have a son with Tourette Syndrome and we tried a variety of medications but found they only made things worse. He is now 19yo and has been on a natural treatment program since the end of 2001 which has really helped him

I have a thread about what we did on the Tourette forum here
http://neurotalk.psychcentral.com/thread1145.html

things may be different for your child tho because of the autism, but I do know other parents with autistic kids who have also seen a lot of benefits from altwernative treatments.

Have you ever been to a DAN doctor? (DAN stands for Defeat Autism Now) They have a very different approach and maybe this can be beneficial for your child
there is ifo and a list of doctors here:
http://www.autism.com/ari/