I'm new to this forum, but reading your post touched a nerve with me too. I have had migraines all my life..the first one I remember was at 6 years of age, but my mother remembers me getting them earlier than that. I was lucky on one hand, to have a very supportive Mom who understood, and also my brother suffered terribly as well so it helped to have someone commiserate! But on the other hand, the doctors were not too helpful and I didn't get a proper diagnoses until 17 or so. I am now 34 and have chronic migraines and have likely tried everything under the sun myself. Now, I'm basically using Tylenol with Codeine combined with Zomig by injection. I've also recently started a magnesium/vitamin B combination but its too new to say for sure.
Tell your daughter to try not to get too disillusioned. Having pain on a regular basis can be so frustrating! Especially when it cuts into social time, let alone school and dreams. I find for me, taking the whole 'one day at a time' thing is very helpful. When she has a bad day, take it for what it is and do best to put it behind her and start the next day new. The worst thing for us 'migrainey' folks is to get caught up in the whole 'ohno..is it going to come back today???' I also think your idea of advising the school faculty wouldn't be bad. Things tend to go in waves, but if you can take the stress off of keeping up at the same pace as those fortunate non-migrainers, I'll bet it will help her relax and focus on feeling better, and at the same time, hopefully relieve some of the more acute moments. It's awful at times, as we all know, and whatever you can do to alleviate the stress during the bad times, it can sometimes help make the good times last a bit longer.
As for demerol, I know it certainly has it's downfalls but taken in moderation, is certainly not a bad option. Like I said, I've had migraines all my life. My frequency at the best of times is about 1 every 10 days, at worst, I'm every other day and some last forever - like 10-14 days at a time. I have had to cave and take the 'D' shot only about dozen times in my life and for those times, I can only say that it was the best option and I don't regret it. Sometimes that extra 'slam' can kick me into almost a remission for a few weeks. Granted, it's not a light decision but between that and codeine for me, is what keeps me able to work a full-time job and have a life. If taken for the right reason, it's certainly a good option IMHO.
Well, I've written a book here...sorry 'bout that. Just reading your daughter's situation reminded me of my high school days and my heart goes out to her.