Educational information, not medical advice — ask your doctor or midwife.
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Kāśa (Saccharum spontaneum), known in English as wild sugarcane or thatch grass, is a tall wild grass whose root and rhizome (the underground stem) are used as a single-herb Ayurvedic medicine. It is used mainly for urinary complaints such as burning or difficult urination, and as a cooling drink in hot weather.
A quick note on the name: in Sanskrit medical texts "kāsa" also means cough, the illness. This document is about the plant Saccharum spontaneum, not the cough. They are different things that happen to share a name.
On the evidence: Kāśa has a long and well-documented place in classical Ayurvedic practice, but almost no modern human trial work. Traditional standing and proof of effect are two different things, and the sections below report them separately.
The honest answer is that nobody has shown how it works in people, because the studies have not been done.
In Ayurvedic terms, Kāśa root is described as sweet in taste, cooling in action and as a mutrala (something that increases urine flow). It is classed as a pitta-pacifying herb, meaning it is used where the body is seen as running hot, irritated or inflamed.
Laboratory and animal work on the root and stem has reported mild diuretic (urine-increasing) and antioxidant effects. Findings in a test tube or a rat do not reliably predict what happens in a person, and none of this has been confirmed in human trials.
Kāśa is almost always used as the root or rhizome, fresh or dried. Common forms are:
Dried root pieces, boiled to make a decoction (kwatha) — the most usual form.
Fresh root juice (svarasa), taken in small amounts.
Coarse powder (churna) of the dried root.
As one of five grass roots in the classical group Trinapanchamula, sold as a ready-made decoction or syrup.
Kāśa appears in the classical Ayurvedic compendia, including the Charaka Samhita and Sushruta Samhita, which are roughly two thousand years old. It is best known as a member of Trinapanchamula, a set of five grass roots (Kusha, Kāśa, Shara, Darbha and Ikshu) used together for urinary and burning complaints.
The plant grows widely across India, Southeast Asia and parts of Africa, often on riverbanks and waste ground. Outside medicine it has long been cut for thatch, rope and paper.
See a doctor promptly if burning or pain when passing urine does not settle within a week, or if it comes with fever, chills, back or side pain, or blood in the urine. Go to urgent care straight away if you cannot pass urine at all, if you feel faint or confused, or if you develop a rash, swelling of the lips or face, or trouble breathing after taking it. Also speak to your doctor before starting Kāśa if you take any prescribed medicine for your heart, blood pressure, mood or diabetes.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Kāśa is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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