How to deal with a dog with ADHD, drug have not helped?

I have a 1 year old Black and Tan hound mix. I notice he exhibits ADHD symptoms. He can't sit still for long, can never settle/relax, always running, panting, vocalizing, jumping up, always moving, distracted, and hard to train. He also has seperation anixety, when I leave in the morning to go to work he tries to eat through the front door to come after me. I had to put him in a kennel while I am gone, and then he cries, barks, pants, licks the cage and hyperventalates. I would try to play with him, one minute he wants to play the other he doesn't. It is really hard to deal with this dog. He is exercised (playing ball and walking), but after a few minutes he's hyper again, so we take him for a couple of mile run every night; he gets home and 20 minutes later he is ready to go again. He's like the energizer bunny. The vet first gave him prosac, but that did not help; the lastest thing was clomacalm 80 mg, I gve him 2 pills twice a day, nothing. He is a smart dog he will do things like sit, stay, laydown, and rollover but only when he wants and only when you have a treat in your hand. Please HELP! I have tried 8 months now and nothing has worked yet. I am tempted to try and contact Ceasar Milan/ Dog Whisper