Vacha

TRADITIONAL VIEW, WITH SAFETY LIMITS

Hindi name: Bach

What the texts say Vacha does

• Medhya — supports intellect and memory
• Vamaka — emetic
• Deepana — kindles digestion (appetiser)
• Kaphaghna — pacifies kapha
• Shoolaprashamana — relieves colicky pain

What the evidence says. Traditional use is extensive and long recorded. Modern clinical evidence is limited.

Side effects and limits

• Nausea and vomiting — the tradition uses it as an emetic, so this is an expected action and not only a side effect
• Mouth and throat irritation

Avoid or ask first: Pregnancy and breastfeeding.; Use in children without a qualified practitioner, given the above.

A traditional classification, not a recommendation. The full safety record is below.

AS THE CLASSICAL TEXTS AND THE API PRESCRIBE

Small matra and short courses: beta-asarone in the Indian variety is genotoxic, and it is barred as a food additive in the US.

Reported from Sharangadhara Samhita and the Ayurvedic Pharmacopoeia of India. Laisha states what the texts prescribe; it does not recommend. No quantity here is adjusted for a particular person — not for agni, koshtha, bala, age, pregnancy, kidney or liver function, or anything already being taken.

Ayurvedic Pharmacopoeia of India, Part I

Beta-asarone is the marker and also the safety concern: it is genotoxic in animal studies, and the European authorities restrict it. The content varies sharply with the variety of Acorus.

These are the marker and the identity test for this dravya, and they are not a test Laisha has run on anything. Laisha does not state the numeric limits here: the assay, ash and extractive figures must be read from the current edition of the Ayurvedic Pharmacopoeia of India, because a wrong limit printed here is a number a laboratory would act on. The entries in this library that DO carry figures carry them because each one was checked.

Katu and tikta with ushna virya and katu vipaka — the profile the texts associate with its action on kapha and on the channels of the mind.

These are the actions the classical texts record. They are statements about what the tradition holds, and this library does not restate them as findings about a human body.

Ugragandha means fierce-smelling and is the identifying feature: the rhizome is recognised by its smell before anything else. Shadgrantha, six-jointed, describes the segmented rhizome.

Rasa, guna, virya, vipaka and karma are recorded as the classical texts give them, with the text and section named so a student can open the book and check. Where an exact chapter and verse could not be confirmed, this library names the section rather than inventing a number.

Other Acorus material is traded under the same name, and this is not a cosmetic difference. The rhizome carries a compound called beta-asarone, and how much of it there is depends on the variety — the Indian and European material and the North American material differ markedly. A buyer who cannot say which variety they have cannot say what they are holding. Iris rhizome is also sold as vacha in some markets.

Matched live against the GBIF backbone on 28 September 2026 at 99 per cent confidence. Acoraceae is a family of one genus; the plant is not a true rush or reed despite the look of it.

A WAY TO REMEMBER IT

Acorus is akoron, from kore, the pupil of the eye — it was used for eye disorders. Calamus means a reed. Vacha means speech, for its use in disorders of it.

Vacha is described in the Bhavaprakasha Nighantu and is recorded in the classical literature as medhya and as acting on speech. That is what the tradition holds and where it is written down, not a finding about what the rhizome does in a body.

Constituents. The rhizome carries an essential oil whose main constituent in most Indian material is beta-asarone. The proportion varies greatly between varieties and this is the reason the entry above insists on knowing which one.

• This is a study and clinical reference for practitioners and students. The matra and anupana it records are what the classical texts and the Ayurvedic Pharmacopoeia of India PRESCRIBE — Laisha reports them, it does not recommend them. They are not a prescription for any particular person, and they are not adjusted for your age, agni, koshtha, bala, pregnancy, kidney or liver function, or anything else you are already taking. Only a qualified practitioner who has examined you can do that.
• Traditional classification is recorded as what the classical texts say, with the text and the place in it named so it can be checked. It is not restated as a finding about a human body.
• Nothing here replaces a qualified Ayurvedic practitioner or a doctor.