Calamus is a plant. The root (rhizome) is utilized to make a prescription. In spite of security concerns, calamus is utilized for gastrointestinal (GI) issues including ulcers, irritation of the stomach lining (gastritis), intestinal gas (fart), agitated stomach and loss of hunger (anorexia). 
Sweet banner or calamus has been utilized since old occasions, anyway, current abuse of the root oil has offered to ascend to worries over its utilization. Generally, calamus was utilized for its impacts on the stomach related framework and the lungs. This herb wipes out mucus, clears clog, and sedates the brain. Customary uses include: amnesia, heart palpitations, sleep deprivation, tinnitus, interminable bronchitis, and bronchial asthma. 
The root oil is solid and fragrant, its taste warm, bitterish, sharp and sweet-smelling. Its dynamic standards are taken up by bubbling water. It is a thick, light yellow fluid, and has high toxicity(see alerts.)