"Can you tell me about Pycnogenol and Maquelier's OPC (pine bark extract and grape seed oil extract)? I have heard good things about these treatments but would like to know about side effects."
Larry Silver, M.D.
The scientific literature shows that neither of the products you list helps individuals with ADHD. Manufacturer trying to sell the products provide the only literature available suggesting that they work. I discourage you from considering either. If you want a summary of the literature on these proposed alternative therapies, you might read the chapter on such therapies in my book (either The Misunderstood Child or Dr. Larry Silver's Advice to Parents on ADHD).