I don't know if this is a new one or not, but my 8yo daughter is taking Neurontin as a last-resort medicine for intractable Complex Partial Seizures. She is on 800mg 3x/day. It has been like giving her speed--she can't sit still, can't concentrate, and runs through the house flapping her arms like wings or jumping up and down and flapping. She has experienced the trembling legs, the dizziness, the headaches.