I had an increase in migraines, and I did take triptans for 10 or so years (I now no longer take triptans because eventually they became ineffective... they work for a few hours, then the migraine comes back worse than before), but like so many things about this disease, it's hard to nail down cause. Was it because of the triptans that I got worse, or was it just the natural progression of migraine disease? Did my body just get used to the drug after so long taking it?
It is important with triptans or any painkiller not to use them more than 2 times per week, 3 in an emergency, but I know you probably already know that.