Abstract: The invention provides methods for treating, suppressing, ameliorating and/or preventing the effects of disorders relating to concussion, including those associated with post-concussion syndrome. The methods comprise administering to a subject an effective amount of a compound that modulates neuronal ion channel function, or a pharmaceutically acceptable salt, solvate or hydrate thereof, or a composition comprising a compound that modulates neuronal ion channel function, or a pharmaceutically acceptable salt, solvate or hydrate thereof, and a pharmaceutically acceptable carrier. The invention also provides inventive methods relating to identifying, classifying and/or diagnosing conditions involving post-concussion syndrome and related concussive disorders.