Acorus calamus or calamus root is an herb that has been traditionally used as a digestive aid and as a treatment for congestion. It is typically brewed as a tea or applied externally as a bath additive or an alcohol rub.
Acorus calamus is a stimulant and a hallucinogen. Some preclinical studies suggest that acorus calamus may be effective in treating neuropathic pain. In regulated doses, acorus calamus has shown promise in treating the symptoms of psychological disorders and depressopn, relieving inflammation, and muscle and joint pain.
Many countries actually prohibit the use of acorus calamus in food products because it contains beta-isoasarone, a known toxic carcinogen. It is also unsafe to be taken orally because it has been recorded to cause shaking, kidney damage, and seizures. Natural products are not always safe, and people who use acorus calamus should definitely be wary of the dosage.