Pain Relief. Muscle Pain & Stiffness Swelling from Injuries Bruising. Non-Drowsy No Drug Interactions. Approx 80 Quick-Dissolving Pellets Per Tube. Arnica Natural Active Ingredient . Arnica montana has been used for centuries as a natural pain reliever. Today, it has grown to be one of the most popular homeopathic medicines throughout the world. Arnica is trusted by professional athletes to soothe sore muscles, by prominent cosmetic surgeons to relieve post-procedure pain, and by savvy moms to treat playground bumps and bruises. Uses temporarily brings relief to muscle pain and stiffness due to minor injuries, overexertion and falls reduces pain, swelling and discoloration from bruises.