Is arnica montana for hiatal hernia?

Not recommended: Arnica montana is sometimes grown in herb gardens and has long been used medicinally. It contains the toxin helenalin, which can be poisonous if large amounts of the plant are eaten. It produces severe gastroenteritis and internal bleeding of the digestive tract if enough material is ingested. No herbal remedy has conclusively shown benefits for hiatal hernia symptoms when studied scientifically.