For what it's worth, my dental hygienist knows to ask what I have been using, and she gives me feedback on how well it has worked. Some of the best feedback came from using ground horsetail herb. I need to get some more of that - it is good for so many things.
Miss Lydia, if you have the touch with the hammer, stick with it!!!
But the mortar and pestle is a neat thing to use. Just last night I ground up that pill, and some sea salt and some charcoal for making my toothpaste. And if I may anticipate what you are thinking, yes, it is not a pretty...
Hey, so I am not the only one who uses a mortar and pestle. My mom gave me mine, oh, gosh, maybe thirty years ago and at the time I thought it was beautiful, but I put it away for years and rarely used it.
These days, I find I use it at least every couple of weeks. Probably will be using it...
Miss Lydia, you are very likely much more - umm, you probably have more finesse than I do. I fear I would knock the edge off the counter if I tried the hammer approach. Some of us are talented like that.
I would try placing the tablet in a little water overnight, see if that softens it. Just an idea, I have not done this before. At our place, I have a marble mortar and pestle, and just last night crushed up a mineral pill quite handily. Some people have pill crushers.