My mother used to give me the little homeopathic sugar pills for sore muscles. But now that I am an adult, I tend to think that homeopathy is, well, bunkum. There is not scientific evidence to support it and it defies common sense to think that something becomes more powerful as it is highly diluted.
But I had no idea that there was a non-homeopathic version of the salve. I do get sore muscles from working out and I'm not totally happy with the other options (like Tiger Balm or Icy Hot). I may give the arnica skin salve a try.