I found out about the vitamin therapy on a web site about autism. Just look it up under search. I read (and this is the dosage I gave Joshua) you start off w/ 1/2 a tab a day for a few days and if you see any improvement after then you can go up to a whole tab a day, it said you can give up to 4 a day but thats probably after they have taken them for a while. After a couple of weeks on DMG you can also add B6 and Mag. I found them at a health food store they did not sell them at any drug store (wal greens,rite aid ect...) but call around before you go out looking for them my husband went to like 5 stores! I put a little water in a medicine cup and crush the pill up w/ a spoon and mix it in the water to make sure he gets the right amount. It dissolves very good, it's not like a big vitamin! But I read on a website that they had a liquid also? But good luck~ Just look up DMG and all kinds of info will come up. I found nothing bad about it.
You may want to try:
They specialize in vitamins for children with autism. They have the liquid DMG,
http://www.kirkmanlabs.com/products/dmg_tmg/dmg/DMG_L_16_Spe c008.html
Thanks for the info!