comfrey, a perennial herb found in the United States, Australia, and parts of Asia, also cultivated in Japan. ▪ INDICATIONS: It is used for bruises, sprains, broken bones, acne, and boils. It is considered safe and possibly effective when used topically. ▪ CONTRAINDICATIONS: Medicinal teas of comfrey are considered unsafe. Use of topical comfrey is not recommended during pregnancy and lactation, in children, and in those who are hypersensitive to this product. Internal use may cause fatal hepatotoxicity. It should not be used for more than 6 weeks or topically on broken skin.