I used to get the much more often, so I'm grateful that they're only about once every six week or so, but they tend to come in clusters. (Bill was actually trying to postpone his trip to Utah because I had that last a few days last week.) About 3-4 times a year, I get a REALLY bad one and have to get a shot of Demerol and sleep it off for a couple of days. If I had an addictive personality, Demerol would TOTALLY be my drug of choice...
It's a beautiful thing...