Arnica, in homeopathic preparations, works really, really well. And homeopathic tablets are not in any way toxic, no matter what the remedy, owing to the way that they are prepared. Also, unliked any other the other medicines and therapies--they are inexpensive.

I use homeopathy, and see homeopathic physicians (yes, real, licensed MDs, who specialize in Homeopathy, which is a legitimate medical specialty) and it does work. Furthermore, there is a significant body of medical research that shows that it works, some of which is here :Published Research on the Clinical Effectiveness of Homeopathy

Homeopathy is based on a very old observation--which is that, for some reason that no one can quite explain, medical symptoms disappear when treated with small amounts of substances that cause the symptoms in large amounts. Even more inexplicably, the smaller the amount, the more effective the remedies seem to be.

I can't explain it, which is mildly annoying, but in my own experience, I've seen it work repeatedly.

I can give you any number of experiences where Arnica gel relieved twisted ankles, strained backs, bumped knees, and such, but this is the most amusing:

I had an acquaintance who was scheduled for liposuction, which results in a significant amount of temporary bruising and discoloration. I gave her a large tube of Arnica gel, which she applied, though rather sloppily. The results were that the bruising was very light, except for black and blue streaks in the areas she'd missed.