Arnica belongs to the sunflower family, and has been used for centuries to relieve bruises, sore muscles and stiffness. It is usually used in the form of a gel or salve, but can be used in tablet form as a homeopathic remedy.
So, if you have a choice between Ibuprofen and a natural remedy, which would you choose? I know what my choice would be.
As with anything herbal, if ingested, please research before you decide to try it.