its a homeopathic drug-
'It helps reduce shock, relieve pain, diminish swelling and begin healing. Arnica is a great medicine for injuries to muscles, and also when there is pain from over exertion. It removes bad effects of shock from injury...'
Common conditions for use: Shock or trauma of injury, surgical shock, muscle injuries, pains due to over exertion, concussions and contusions. Sore, lame, bruised feeling/pain all over the body as if it has been beaten, before and after surgery.
'....a ninja skier probly came by and whacked him with his pole.... thats my guess' -nordas-