Materia Medica · The Renewer

Punarnava

पुनर्नवा
Boerhavia diffusa · Nyctaginaceae · hogweed

The spreading creeper that withers in the dry season and springs back to life with the first rains — and whose very name, punar-nava, means “new again.” Ayurveda turns to it to do for the body what the rains do for the plant: to drain stagnant fluid, ease swelling, support the kidneys, and renew. It is the foremost herb for fluid balance — the destroyer of swelling.

Reading time · ~13 min Reviewed by OmAyurved Vaidya Board Updated 1 Jun 2026

At a glance

Botanical nameBoerhavia diffusa
FamilyNyctaginaceae
SanskritPunarnava पुनर्नवा · Shophaghni शोफघ्नी · Varshabhu वर्षाभू
Also known asPunarnava, hogweed, red spiderling, gadahpurna
Part usedWhole plant / root
Rasa · tasteSweet, bitter, astringent (madhura, tikta, kashaya)
Virya · potencyHeating (ushna)
Vipaka · after-effectPungent (katu)
Qualities · gunaLight, dry (laghu, ruksha)
Effect on doshaBalances all threeespecially Kapha & Vata
Key actionsReduces swelling · diuretic & kidney support · rejuvenative · heart & liver · cleansing
Traditionally forSwelling & fluid, the kidneys, the heart & liver, urinary

The renewerपुनर्नवा

Punarnava is a humble, spreading creeper of waysides and fields — and one of the most quietly remarkable plants in the materia medica. Through the dry months it shrivels and seems to die; then the first rains arrive and it springs back, green and new. The ancients watched this and named it for what they saw: punar-nava, “new again,” the renewer.

That renewal is the whole idea of its medicine. Just as the plant draws new life from the rains, Punarnava is used to move and renew the body’s waters — to drain the stagnant fluid that gathers as swelling and puffiness, and to refresh the organs that govern fluid. Its other names say as much: Shophaghni (शोफघ्नी), “the destroyer of swelling,” and Varshabhu (वर्षाभू), “born of the rains.”

Above all, Punarnava is Ayurveda’s foremost herb for fluid balance and the kidneys. It gently promotes the flow of urine (a mutrala, or diuretic), eases water retention and swelling, and supports the kidneys, the urinary passages, and — through the same drainage — the heart and the liver, where stagnant fluid also gathers. Because swelling can be a sign of something serious in those organs, this is a herb to use with knowledge and care (see Safety). It grows in two varieties — the red-stemmed rakta Punarnava prized in medicine, and a white-flowered shveta type.

How Ayurveda reads itरस · वीर्य · विपाक

Ayurveda describes a herb not by its chemistry but by its qualities — how it tastes, whether it heats or cools, and what it does once digested. These few coordinates predict how a plant will act on the doshas. For Punarnava:

  • Rasa (taste): sweet, bitter, and astringent — the sweet that nourishes and renews, the bitter and astringent that drain, dry, and cleanse the stagnant.
  • Virya (potency): heating — its warmth helps it move and drain accumulated fluid rather than letting it sit cold and stagnant.
  • Vipaka (post-digestive effect): pungent — light and clearing once metabolised, reinforcing its draining, decongesting action.
  • Guna (qualities): light and dry — exactly the qualities to counter the heavy, wet, stagnant nature of swelling and water retention (see the gunas).

From these, its effect on the doshas follows: light, dry, draining, and warming, it most strongly reduces Kapha — the heavy, wet, stagnant quality behind fluid retention and swelling — and settles Vata, while its sweet, nourishing side keeps it from over-depleting. It is broadly regarded as tridoshic. Its special, defining action — its prabhava — is twofold: as the supreme shophahara (remover of swelling) and mutrala (promoter of urine), and as a rasayana of renewal for the kidneys and the body’s waters.

Traditional actions & usesकर्म

The classics assign Punarnava a cluster of actions centred on fluid, the kidneys, and renewal:

Shophaghni शोफघ्नीMutrala मूत्रलRasayana रसायनHridya हृद्यDeepana दीपनPandughna पाण्डुघ्न

In traditional practice, it is used above all to:

  • Reduce swelling and water retention (shophaghni) — its signature use, draining the stagnant fluid that shows as puffiness and swelling anywhere in the body;
  • Promote urine and support the kidneys (mutrala) — as a gentle diuretic and a foremost herb for the kidneys and the urinary passages;
  • Support the heart and the liver (hridya) — easing the fluid that gathers around an overburdened heart or liver, always alongside medical care;
  • Renew and rejuvenate (rasayana) — living up to its name as a restorer of vitality, especially of the fluid-governing organs;
  • Support healthy blood and digestion (pandughna, deepana) — traditionally used in anaemia (with iron-bearing preparations) and to kindle a dull digestion.
Its essential characterPunarnava is the tide that clears the stagnant pool. Where fluid sits and gathers — as swelling, puffiness, or a sluggish, waterlogged heaviness — it drains, moves, and renews, refreshing the kidneys and the body’s waters the way the monsoon refreshes the parched earth. It does not merely flush; true to its name, it restores.

What it’s used forcommon concerns

In Ayurvedic practice, Punarnava is most often turned to for a handful of related concerns — several involving organs where swelling can signal something serious, so medical care matters (see Safety). Each will have its own full guide in this encyclopedia:

  • Swelling & water retention — its signature domain, for puffiness and fluid retention.
  • Kidney & urinary support — as a foremost herb for the kidneys and urinary passages.
  • Heart & fluid — easing fluid burden on the heart, alongside medical care.
  • Liver support — for the liver and abdominal fluid, with proper care.
  • Healthy blood — a traditional support in anaemia.
  • Renewal & vitality — as a rejuvenative for the fluid-governing organs.

Full concern guides — with the doshic picture and the range of supporting herbs and practices — are on their way to this section.

A note on modern researchan honest view

What the science does & doesn’t say

Punarnava has drawn research interest for the very actions Ayurveda has long claimed: its diuretic effect, and protective activity toward the kidneys (nephroprotective) and liver (hepatoprotective), along with anti-inflammatory effects — with attention to its constituents such as the alkaloid punarnavine and various flavonoids.

As ever, much of this work is laboratory- or animal-based and early in scale, so it should be read with appropriate caution. And a serious point bears repeating: swelling and fluid retention can be symptoms of significant heart, kidney, or liver conditions (see Safety), which need proper medical diagnosis — not self-treatment. Traditional use and emerging research are encouraging, but neither replaces personalised advice from a qualified professional and your doctor.

OmAyurved’s view is to honour the depth of the classical tradition while describing modern findings honestly — neither overstating them nor dismissing them.

How to take itअनुपान

Punarnava is used in several traditional forms, the choice depending on purpose:

  • Decoction (kwatha) — the classic for swelling and the kidneys, as in Punarnavadi kwatha and Punarnavashtaka;
  • Fresh juice (svarasa) — the expressed juice of the plant, a traditional remedy for fluid retention;
  • Powder (churna) — taken with warm water, in measured courses;
  • As a leafy vegetable — the tender leaves cooked as a gentle, everyday saag;
  • In classical formulations — including Punarnava mandur (for anaemia with swelling) and the kidney and liver preparations built around it.

A herb to use with its cause in view

Punarnava’s great strength — draining fluid — is also why it must be used thoughtfully. Mild, occasional puffiness is one thing; but persistent or significant swelling is the body signalling that an organ may need attention, and the right step is to find out why, not simply to drain the fluid away. Used well, under guidance and alongside proper diagnosis, Punarnava is a faithful long-term ally for the kidneys and fluid balance; used to mask a warning sign, it does a disservice. As ever, a qualified practitioner can place it rightly.

On dosageTraditional texts and modern products vary in the amounts they suggest, and with a herb that affects fluid and the kidneys, the right amount depends on you and your health. Rather than self-prescribing, follow the guidance on a quality product and, importantly, a qualified practitioner and your doctor.

Safety & cautionsimportant

Please read before use
  • Swelling can signal serious illness: persistent or significant swelling, puffiness, or fluid retention can be a symptom of heart, kidney, or liver disease and needs prompt medical evaluation — do not rely on Punarnava (or any herb) to treat it without finding the cause.
  • Kidney, heart & liver conditions: if you have a diagnosed condition of these organs, use Punarnava only under the joint guidance of a qualified practitioner and your doctor.
  • Diuretic effect & medications: as it promotes urine, it may affect fluid and mineral balance and may add to the effect of diuretic, blood-pressure, or heart medications — coordinate with your doctor, who may need to monitor you.
  • Pregnancy & breastfeeding: avoid medicinal doses unless advised by a qualified practitioner.
  • Blood sugar: it may lower blood glucose — monitor if you have diabetes or take blood-sugar medication.
  • Dehydration: being draining and diuretic, avoid in dehydration and ensure adequate fluids.

This is general guidance, not a complete list. Always consult a qualified practitioner or doctor before starting any herb, especially for swelling or the kidneys, if you are pregnant or nursing, or if you take medication.

Bring it homefrom knowledge to remedy

When you’re ready to bring Punarnava into your routine, it will be offered in the forms it has taken for centuries — sourced, prepared, and tested to a standard worthy of the renewer.

The OmAyurved standard
Single-origin & ethically sourcedTrue red Punarnava (Boerhavia diffusa) traced to its growers.
Prepared by classical methodWhole plant and root, shade-dried and milled the traditional way — no fillers.
Independently testedEvery batch verified for species, purity, and freedom from contaminants.
Nothing added, nothing hiddenThe whole herb and only the herb — pure plant and an honest label.
Coming soon
Punarnava Powder
Whole-plant churna · single-origin

Pure, finely milled red Punarnava — for measured courses to support fluid balance and the kidneys, under guidance.

  • Verified Boerhavia diffusa
  • Whole plant & root, milled fresh
  • Lab-tested for purity
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Coming soon
Punarnava Capsules
Concentrated whole plant

A measured daily form — concentrated whole-plant Punarnava, convenient for a guided course of kidney and fluid support.

  • Whole plant, not isolates
  • Plant-based vegetarian capsule
  • Third-party tested
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Coming soon
Punarnava Kwath
Classical decoction blend

A ready blend for the traditional Punarnava decoction — the time-honoured liquid form for swelling and the kidneys.

  • Classical decoction recipe
  • Whole herbs, coarsely cut
  • Third-party tested
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Pairs well with

Classical sources

  • Charaka Samhita — Punarnava among the herbs for shotha (swelling) and as a noted rasayana, with its renewing, fluid-clearing reputation.
  • Sushruta Samhita — for swelling, the kidneys and urinary passages, anaemia, and as a cleansing, rejuvenating herb.
  • Bhavaprakasha Nighantu — the classical materia medica entry (Guduchyadi varga): its sweet-bitter-astringent taste, heating potency, the two varieties (rakta and shveta), and its shophaghni and mutrala uses.
  • Punarnavadi & the formulary — Punarnava at the centre of Punarnavadi kwatha, Punarnavashtaka, and Punarnava mandur.

Two varieties are described: red Punarnava (Boerhavia diffusa, the principal medicinal type — this entry) and a white type. Properties vary slightly across the classical nighantus; OmAyurved presents the widely taught consensus. Modern research is summarised in general terms and is not a clinical endorsement.

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