I thought that you weren't suppoed to crush some tablets because they are meant to be absorbed or whatever slowly, and when you crush them they get absorbed quicker so your body gets a bigger dose at once that it would if it was being released gradually. Don't hold me to it, that's just something I've picked up somewhere or other. Couldn't say if it's exactly correct or not. :)
Any way, to answer your question... well, I don't have an answer, although I never used to be able to swallow tablets because the first time I tried I nearly choked and it put me off. I got over this by my brother leading me through it step by step - sounds wierd I know, lol.