A further update on the issue, guys; I began taking magnesium tablets two days ago, and so far have had no cramps at all. The jury's still out though!
I have the same problem with leg cramps. My doctor recommended magnesium and it worked but after awhile I got a reaction and could not take it anymore. Now I've been taking Hyland's Leg Cramp pills. I think they've got quinine in them. They are a homeopathic type treatment and they work for me. The only problem is that they're only good for four hours or so. I take two at bedtime and usually make it all night (7 1/2 hours). Might be worth looking at.
I'll check `em out, Moose; The magnesium seems to be working so far. I decided to test it yesterday, so didn't take the evening pills after scything my "back 40". Hadn't used the scythe for quite a while, and worked up a good sweat doing so. Then a serious period of relaxation after dinner with a good cigar. This usually brings out the cramp gremlin, and sure enough, as I got out of bed this morning, there he was, waiting for me!
There's an old folk remedy for night-time cramps, sleeping with a bar of soap in your bed. I know this sounds flaky and I was/am skeptical myself, but my Mom swears by it. If you google "bar of soap" and "leg cramps," you will get lots of info. Doesn't cost much to try.