LAISHA · DRAVYAGUNA

Khadira

खदिर

Senegalia catechu (L.f.) P.J.H.Hurter & Mabb.

Fabaceae · Senegalia

One name, more than one plant

Matched live against the GBIF backbone on 28 September 2026 at 99 per cent confidence. Acacia catechu is a synonym and is the name almost all Ayurvedic literature uses; the genus was split and the plant did not change.

Benefits & side effects

TRADITIONAL VIEW, WITH SAFETY LIMITS

Hindi name: Khair

What the texts say Khadira does

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

Side effects and limits

Avoid or ask first: Conditions aggravated by ruksha dravya, in prolonged use.

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

Stands in 2 groups

A Samhita can only be read forwards, from the group to its members. This is the same list read backwards.

Photographs

Matra and anupana

AS THE CLASSICAL TEXTS AND THE API PRESCRIBE

Kwatha50–100 ml
Saara churna1–3 g
AnupanaUshnodaka · Madhu
KalaAdhobhakta

Heads the Kushthaghna dashemani. The heartwood extract (khadira saara, catechu) is the concentrated form.

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.

Rasapanchaka

Rasa
TiktaKashaya
Guna
LaghuRuksha
ViryaSheeta
VipakaKatu
PrabhavaThe texts name khadira first among kushthaghna dravya, and treat its action on the skin as prabhava. It is also the classical dravya for the mouth.
DoshakarmaKaphapittahara. Being ruksha it increases vata markedly, and the texts warn of that.

Tikta and kashaya with sheeta virya and katu vipaka. Kashaya predominant, and it is the standard example of a kashaya dravya in Dravyaguna.

Karma and part used

KushthaghnaKrimighnaRaktashodhanaDantyaVranaropanaMedohara

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.

Upayukta angaSara (the heartwood)
Khadira sara (the boiled extract)
Why it mattersThe heartwood is the dravya, and the extract boiled down from it is Khadira sara, sold as katha — the same substance that goes into paan.

Paryaya

GayatriDantadhavanaRaktasaraKantakiBalapatra

Dantadhavana, tooth-cleaning, records the use of the twig as a brush. Raktasara, red essence, names the colour of the heartwood and of the extract.

Names, by language

EnglishBlack catechu
SinhalaKihiri
NepaliKhayar
HindiKhair
KannadaKachu
TamilKarungali
TeluguSandra
MalayalamKaringali
MarathiKhair
GujaratiKher
BengaliKhoyer
PunjabiKhair
OdiaKhaira
UrduKath

Classical references

Charaka Samhita
Chikitsasthana, the chapter on kushtha
Khadira is named foremost among the dravya used where the skin is affected.
Bhavaprakasha Nighantu
Vatadi Varga
Gives the rasa, guna, virya and vipaka of khadira.
Sushruta Samhita
Sutrasthana, chapter 38 (Dravyasangrahaniya)
Included among the dravya grouped by action.

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.

Formulations it appears in

KhadirarishtaA fermented preparation named for the dravya.
Khadiradi VatiNamed for the dravya, used in the mouth.
Khadira GhritaNamed for the dravya.

Adulterants and substitutes

Extract of other Senegalia and Acacia species is sold as katha, and because the article is a dried brown block the substitution is hard to see. Commercial katha for paan is a food article rather than a medicinal one and is frequently bulked with starch, clay and colour. Areca catechu, the areca nut, is confusingly also called catechu in some contexts and is an unrelated plant with a very different safety picture.

Identity

Matched live against the GBIF backbone on 28 September 2026 at 99 per cent confidence. Acacia catechu is a synonym and is the name almost all Ayurvedic literature uses; the genus was split and the plant did not change.

A WAY TO REMEMBER IT

Senegalia is for Senegal, where the genus was split from Acacia. Catechu is from the Malay kachu, the extract itself — the source of the word catechin.

What the tradition holds

Khadira is named in the Charaka Samhita as foremost among dravya for the skin, and is described in the Bhavaprakasha Nighantu. That is what the tradition holds and where it is written down, not a finding about what the wood does in a body.

Constituents. The heartwood and extract carry catechins and tannins in high proportion, which is what makes them astringent and what gives the extract its use as a tanning and dyeing material.

What the evidence says

StatusTraditional use is extensive and long recorded. Modern clinical evidence is limited.
SuggestedHealth Canada publishes monographs covering Ayurvedic ingredients and permits specific traditional-use claims, which reflects a regulator accepting a documented tradition rather than a body of clinical trial evidence.
Not establishedThere is not enough good clinical evidence to establish an effect on any named health condition. Long traditional use is not a substitute for that evidence, and this library does not present it as one.
The honest gapPublished work on catechin-rich extracts is extensive but rarely uses khadira as the tradition prepares it.

Safety

Used very widely and no serious harm is documented at traditional use. It is strongly ruksha and the texts themselves warn that it aggravates vata, so prolonged use dries the body. Its heavy tannin content can reduce the absorption of iron and of medicines taken at the same time. One thing worth naming plainly: khadira extract is an ingredient of paan, and the harms associated with paan come from areca nut and tobacco chewed with it, not from khadira — a student should be able to separate those, because patients will not.

Side effectsConstipation and dryness
Digestive upset
Staining of the mouth and teeth
ContraindicationsConditions aggravated by ruksha dravya, in prolonged use.
InteractionsNo specific drug interaction is documented for this dravya. That is the honest state of the evidence, not a statement that none exists — most Ayurvedic dravya have never been studied for interaction. Tell the prescribing doctor it is being taken.
The high tannin content can bind co-administered drugs. Separate by two hours.
Pregnancy and breastfeedingThere is not enough evidence to establish safety in pregnancy or breastfeeding, and a qualified practitioner should be asked first.

Growing it

ClimateDry tropical; a thorny tree of dry deciduous forest and scrub.
SoilPoor, dry, well-drained and stony ground.
PlantingA tree, raised from seed. Hardy and drought-tolerant.
HarvestHeartwood is taken when the tree is felled, chipped and boiled down to make the extract, which is dried into blocks.
What is not statedThis library has not verified region-specific spacing, variety and yield figures against a named agricultural authority for every growing country, and does not state them rather than guessing.

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What this is not

Sources

GBIF Backbone Taxonomy species-match record for Senegalia catechu (L.f.) P.J.H.Hurter & Mabb.
Global Biodiversity Information Facility (GBIF) · read 2026-09-28
Confirming live, rather than from memory, the accepted botanical name and family behind the Sanskrit name.
https://api.gbif.org/v1/species/match?name=Senegalia%20catechu
The Ayurvedic Pharmacopoeia of India — Khadira (Senegalia catechu)
Pharmacopoeia Commission for Indian Medicine and Homoeopathy, Ministry of Ayush, Government of India · read 2026-09-28
The official Indian pharmacopoeial standing of the dravya and the identity of the part used as the pharmacopoeial article.
https://pcimh.gov.in/
Compendium of Monographs — Natural Health Products
Health Canada, Natural and Non-prescription Health Products Directorate · read 2026-09-28
A regulator outside India that publishes monographs covering Ayurvedic ingredients — used for the safety framing, and for the line between a permitted traditional-use claim and clinical evidence.
https://www.canada.ca/en/health-canada/services/drugs-health-products/natural-non-prescription/applications-submissions/product-licensing/compendium-monographs.html
Classical matra by dose form
Sharangadhara Samhita, Madhyama Khanda
The classical quantity for each dose form, as the standard reference gives it. Sharangadhara is where Ayurveda's dose forms and their measures are set out, and it is what every Dravyaguna textbook reproduces.
https://niimh.nic.in/ebooks/esharangadhara/
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