My 24 year old son had level 2 concussion in Feb., recovered by May where he was assuming normal day to day activities, including biking and running, but left work to recover. He played soccer at the end of June, hit one low/soft header and has been home with post concussion syndrome since. He cannot drive. Has seen neurologists and now post concussion management doctors, goes for vestibular therapy ,takes Gabapenten and Amantadine, yet still has headaches and is not able to resume work, computer work, or low key social activities. Could the medicine not work... thinking of taking him off of them - gradually - what else can we do????