LAISHA · DRAVYAGUNA

Punarnava

पुनर्नवा

Boerhavia diffusa L.

Nyctaginaceae · Boerhavia

Benefits & side effects

TRADITIONAL VIEW, WITH SAFETY LIMITS

What the texts say Punarnava 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: No absolute contraindication is documented here. This is written deliberately rather than left blank.

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

Stands in 7 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

Churna3–6 g
Kwatha50–100 ml
Swarasa10–20 ml
AnupanaUshnodaka · Takra
KalaAdhobhakta

The classical shothahara matra; used in shotha with a watchful eye on any concurrent diuretic.

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.

Pharmacopoeial standard

Ayurvedic Pharmacopoeia of India, Part I

MarkerPunarnavine on TLC
AssayAs the monograph gives
Total ashTotal ash not more than 15 per cent
Acid-insoluble ashNot more than 3 per cent
Alcohol-soluble extractiveAlcohol-soluble extractive not less than 3 per cent
Water-soluble extractiveWater-soluble extractive not less than 12 per cent
Foreign matterForeign matter not more than 2 per cent

Trianthema portulacastrum is sold as shweta punarnava and is a different plant in a different family.

These are the pharmacopoeial limits for the article, not a test Laisha has run on anything. They are here so a practitioner can ask a supplier for a certificate of analysis and know what the numbers on it should say.

Rasapanchaka

Rasa
MadhuraTiktaKashaya
Guna
LaghuRuksha
ViryaUshna
VipakaMadhura
PrabhavaThe texts treat its action on shotha, swelling, as its defining property, and the paryaya Shothaghni records that.
DoshakarmaKaphavatahara. Being ushna it can increase pitta.

Madhura, tikta and kashaya with ushna virya and madhura vipaka.

Karma and part used

ShothaharaMutralaRasayanaDeepanaHridyaRaktavardhaka

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 angaMula (the root)
Panchanga (the whole plant)
Why it mattersThe root is the part the texts call for. The whole herb is also used, and the leaf is eaten as a pot herb in the rains.

Paryaya

ShothaghniVarshabhuRaktakandaKathillakaShilatikaVrishcheeraVrishchira

Punarnava means renewed again: the plant dies back in the dry season and comes up again with the first rain, and Varshabhu — born of the rains — records the same thing. Shothaghni names the action the texts most associate with it.

Names, by language

EnglishSpreading hogweed
SinhalaPita sudu pala
NepaliPunarnawa
HindiPunarnava
KannadaSanadika
TamilMukaratte
TeluguAtikamamidi
MalayalamThazhuthama
MarathiGhetuli
GujaratiSatodi
BengaliPunarnabha
PunjabiItsit
OdiaPurunia
UrduItsit

Classical references

Charaka Samhita
Sutrasthana, chapter 4 (Shadvirechanashatashritiya)
Punarnava is named in the chapter and is placed among dravya acting on swelling.
Bhavaprakasha Nighantu
Guduchyadi Varga
Gives the rasa, guna, virya and vipaka of punarnava and distinguishes the red and white kinds.
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

Punarnavadi KwathaA decoction named for the dravya.
Punarnava ManduraPunarnava is the principal plant dravya.
Punarnavashtaka KwathaNamed for the dravya, with eight ingredients.

Adulterants and substitutes

The texts describe two punarnava, rakta (red) and shweta (white). Rakta Punarnava is Boerhavia diffusa. Shweta Punarnava is generally taken to be Trianthema portulacastrum, which is in a different family entirely, and the two are collected together because they grow together in the same wet season ground. A prescription that says only punarnava does not say which, and a student should expect to be asked that.

Identity

Matched live against the GBIF backbone on 28 September 2026 at 99 per cent confidence. Boerhavia repanda is treated as a synonym. The white-flowered Shweta Punarnava of the texts is generally taken to be Trianthema portulacastrum, a different family, and is discussed below.

A WAY TO REMEMBER IT

Boerhavia honours Herman Boerhaave. Diffusa means spreading, which is how it sprawls. Punar-nava means renewed again: the plant dies back and returns with the rains, and that is the name.

What the tradition holds

Punarnava is described in the Bhavaprakasha Nighantu and is recorded throughout the classical literature as shothahara. That is what the tradition holds and where it is written down, not a finding about what the plant does in a body.

Constituents. The root carries rotenoids including boeravinone compounds, along with punarnavine. Content varies with season, and the plant's own life cycle means material collected in the rains differs from material collected later.

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 rarely records whether the material was root or whole plant, or which of the two punarnava it was, and both change what was studied.

Safety

Eaten as a leafy vegetable in the rains across much of India, which is a long record of ordinary use rather than proof of safety in concentrated form. The cautions that matter concern its action on urine output and its use alongside diuretic medicines. Anyone with kidney disease, on medication, pregnant, or managing a diagnosed condition should speak to a doctor or a qualified practitioner first.

Side effectsDigestive upset
Increased urine output, which is an expected action rather than only a side effect
ContraindicationsNo absolute contraindication is documented here. This is written deliberately rather than left blank.
InteractionsDiuretics — additive diuresis and potassium loss; check electrolytes if the two run together.
Antihypertensives — additive lowering.
Lithium — any drug that changes renal sodium and water handling can change lithium clearance and push it toward toxicity.
Pregnancy and breastfeedingNot to be used in pregnancy without a qualified practitioner. There is not enough evidence to establish safety in breastfeeding.

Growing it

ClimateTropical and subtropical; comes up with the monsoon.
SoilOrdinary ground, including waste ground and field margins.
PlantingSelf-sows; grown from seed where cultivated.
HarvestRoots are lifted after the rains when the plant has grown. Leaf for the pot is taken through the season.
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 Boerhavia diffusa L.
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=Boerhavia%20diffusa
The Ayurvedic Pharmacopoeia of India — Punarnava (Boerhavia diffusa L.)
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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