they will give most a sheet of paper that list any medication that can alter the mind....sudafed has ephedrine in it so it would be listed..some even list caffeine, benadryl,even otc meds like nyquil, couph syrup,, muscle relaxers, valerian root and melatonin as it will alter ur sensorium...a friend follows this religiously...i do not a i am not the type that abuses everything i take...but some do....my friend does...abuses lyrica, zanaflex, ambien...anything she takes...so we have to use our own judgement on what is safe for us to take without getting carried away
Try it for your headaches as long as you take it as perscribed you should be OK .