Yes, good point by susan888 (which I was going to mention, but forgot! Thanks!). I've used it for just a few more years than that, but because my migraines were not overly frequent it wasn't a huge concern. I've got some degree of addictive personality, but not a ton (thank goodness!). Not a confessional, but there have been a very small handful of occasions where I really didn't need to take it, let's say. But literally, less than 6 times over all those years, so not a problem.
More frequent migraines or addictions problems it is DEFINITELY something to be aware of. Thanks for bringing it up, susan888!