Wow! What exactly were his symptoms ?
Usual advice-consult the AME. But it'll likely get him grounded until further investigations.
Difficult to give advice via the internet without actively listening to the paient.
Of course, if he wasn't a pilot, and it was a "one off" it's quite reasonable to adopt a "wait and see" approach, to what sounds like a migranous condition.
Usual triggers include red wine, blue cheese, nicotine, nescafe, hot curry sauce and the days before a period.
Last edited by gingernut; 21st Sep 2012 at 23:36.