Evening Primrose Oil for Attention Deficit?

My son is 5 1/2 and has ADHD. I currently have my son on Ritalin. I HATE the effects of Ritalin. I have been reading up on Evening Primrose and ADHD. Where can I find Primrose oil? We live in Hawaii, and I have been to every vitamin store, health food store, and GNC. None of these stores carry Evening Primrose oil. What kind of oil should I be looking for? Oil to rub on his skin?? Please help!!! I really don't want my son on Ritalin any longer.

Evening Primrose oil is usually taken internally, as a capsule. It is commonly available in North American pharmacies, health food stores and supplement shops.
For more information herbs and diet for ADHD, please see our website www.richters.com. Choose "Q&A" from the main menu, then enter "Attention" for the search.