Helping weather migraines? (P urgent)

Okay so you know how bestfriend gets those headaches, right? He’s prone to them (genetics, 6 concussions) and they’ve been pretty bad.
Any ideas on how to ease his symptoms?
He’s found that Zophran oral works for the severe nausea that comes along with the headaches, but that medication is prescription (was prescribed to deal with post appendicitis symptoms) and he shouldn’t keep taking them like that. Migraine medication doesn’t really seem to help. All that seems to work is hiding in the bathroom with the lights off until it’s gone.