Arnicaeze Arnica Pilules for muscle pain and bruising contain Arnica Montana, which is traditionally used in homeopathic medicine to help relieve strains, sprains, bruising and sore, aching muscles. It may therefore help to relieve muscular pain caused by overexertion, heavy work or sporting activities. Pilules are very small traditional homeopathic pills. You may find pilules easier to dissolve in your mouth and swallow than taking a tablet.