In Ayurveda, Unani, and traditional medicine systems, vacha (Acorus calamus Linn.), also referred to as sweet flag, is a well-known medicinal plant. It is considered a Medhya Rasayana (brain tonic) in Ayurveda and is particularly prized for its effects on the nervous system. The medicinal potential of Vacha is enhanced by the presence of bioactive substances like α-asarone and β-asarone in its rhizome. Vacha has historically been used to treat ailments like anxiety, epilepsy, and sleeplessness as well as to improve memory, intelligence, speech, and cognitive abilities. Additionally, it has digestive, carminative, anti-inflammatory, antibacterial, and antioxidant qualities that make it helpful for gastrointestinal conditions like flatulence, indigestion, and appetite loss. Vacha's usage in respiratory conditions is further supported by its expectorant and bronchodilator properties. The clinically confirmed effects of herbs and herbal medications, such as their anti-inflammatory, analgesic, antipyretic, immunomodulatory, and adaptogenic properties, have sparked public interest. Additionally, the misuse of synthetic drugs, which raises the risk of bad medication reactions, has led people to seek safer cures in nature. Regular use of Vacha, one of the Rasayana dravyas, is claimed to endow one with a sharp mind and a beautiful voice. Vacha is very important in herbal medicine because of its many pharmacological properties, but to guarantee safety and effectiveness, careful dosing and processing are crucial.