Not quite sure whether I get proper migranes or not (I know for some people it really is very serious but it's very difficult to judge your pain against someone else's). Dehydration and lack of sleep tend to trigger what I think of as headaches as well as stress (I'm definitely a stress head, often find myself clenching muscles when I stop and think about it). I find them pretty debilitating and usually end up trying to sleep them off.
They used to be worse when I was younger and usually involved a lot of vomiting. I think I've got better at spotting the symptoms which is maybe why they don't seem as bad. Usually ibropfren taken early enough can calm them (or me) down, leave it too late and they have no effect. Sometimes find exercise clears them, quite often a ride will get them out of my system, but again only if caught early enough. SOmetimes though the exercise can make them a lot worse, ended up bailing from a Gisburn dig day a couple of weeks ago, tried to work through it but it just got worse despite ibroprofen and loads of water, very embarrasing.
My wife definitely gets migraines and has Imigran prescribed. I've nicked a couple on odd occaisions and can't say I've noticed any side affects (although this may be because I try and sleep if it's that bad) she says they often clear the pain can leave her feeling a bit spaced out.