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Arnica montana is commonly used in herbal ointments and oils applied on the skin as an anti-inflammatory and pain-relieving agent for aches, bruises, and sprains on unbroken skin. Highly diluted homeopathic preparations are considered safe and are widely used for the treatment of injuries. However, full doses of arnica may be toxic when taken by mouth. Arnica may also be damaging to the heart, resulting in high blood pressure. The U.S. Food and Drug Administration (FDA) has declared arnica an unsafe herb due to adverse effects reported when taken by mouth. In contrast, the German market offers over 100 preparations of arnica to its consumers. In Canada, arnica is not allowed for use as a non-medicinal ingredient for oral (by mouth) use products.