I have never read anything about using stimulants to deal with sensory overload. Sensory overload is usually a problem because it over stimulates the brain.

The concussion experts I follow have never recommended stimulants. They are usually recommended by GP's, PCP's, and others as a way to help with concentration.

Any doctor that tells you that you have acquired ADHD from a concussion is not aware that a concussion can cause symptoms that mimic ADHD. A NP who has a practice treating ADHD may be overly focused on ADHD diagnoses. Being easy distractible is a result of the brain's filtering function failing to filter out distractions. Lack of focus can also be due to poor immediate and short term memory functions.