What meds is he suggesting?

There are no meds labeled to improve concentration except for ADD meds like Ritalin or Adderall. Both should be avoided for PCS since they are stimulants. Stimulants are contra-indicated for PCS.

I would seriously question a doctor who prescribes an amphetamine like Adderall to someone recovering from a brain injury. The concussed brain needs rest, not stimulation.

Just not right, What kind of concentration problems are you hoping to treat?