Nagadanti: Benefits, Evidence & Safety

TL;DR

Nagadanti is Croton oblongifolius Roxb. (Euphorbiaceae), an Ayurvedic plant used traditionally as a strong purgative: related to the notoriously toxic purging croton, Croton tiglium. Laboratory studies have found cytotoxic diterpenoids in its bark, but there are no human trials of any benefit. It must not be self-administered: Croton species can cause violent purging, dehydration and collapse. (57 words. Sources: C.P. Khare, Indian Medicinal Plants: An Illustrated Dictionary; Roengsumran et al., Phytochemistry 2001; NatMed Pro croton-seed monograph via WebMD.)

What it is

Nagadanti (Sanskrit: नागदन्ती) is identified as Croton oblongifolius Roxb., family Euphorbiaceae, a plant of central, western and southern India extending eastward to Bengal (C.P. Khare, Indian Medicinal Plants: An Illustrated Dictionary).

It must be distinguished from its better-known relative Croton tiglium L., jayapala, the "purging croton", whose seeds and seed oil are among Ayurveda's most drastic purgatives. Khare's dictionary equates the action of C. oblongifolius with that of C. tiglium, and similarly distinguishes the related drugs danti (Baliospermum montanum) and dravanti (Khare dictionary). Do not confuse nagadanti with jayapala (a separate Swastik article covers it), but assume comparable caution for both.

Traditional use

These are traditional claims, not clinical proof: and they describe uses that modern toxicology regards as dangerous outside expert supervision.

Khare's dictionary records the Ayurvedic action of nagadanti as cathartic: "same as that of C. tiglium": used in ascites, anasarca, dropsy and enlargement of the abdominal viscera, with the seed oil acting as a purgative (Khare dictionary). For C. tiglium itself, classical Ayurveda uses the seeds only after śodhana, a detoxification process, traditionally purification with cow's milk, because of their severe purgative action (J Ayurveda Integr Med, C. tiglium śodhana study). These traditions reflect a plant class that classical physicians handled as a poison-medicine, not as a general remedy.

What modern research says

Chemistry and cytotoxicity (laboratory studies)

Phytochemical work has isolated labdane diterpenoids from the stem bark of C. oblongifolius; in cell-culture tests, one compound showed non-specific, moderate cytotoxicity against several human tumor cell lines (Roengsumran et al., Phytochemistry 2001). A cembranoid diterpene from the stem bark, neocrotocembranal, inhibited thrombin-induced platelet aggregation (IC50 47.21 µg/mL) and was cytotoxic to P-388 leukemia cells in vitro (IC50 6.48 µg/mL) (PubMed).

A 2019 Molecules review of Myanmar medicinal plants summarizes further findings: the compound croblongifolin from the stem bark showed cytotoxicity toward five human tumor cell lines: HepG2 (IC50 0.35 µM), SW620 (0.47 µM), CHAGO (0.24 µM), KATO3 (0.35 µM) and BT474 (0.12 µM): and a 2016 study evaluated anti-tumor activity of the methanolic stem-bark extract (Molecules 2019 review). These are petri-dish and animal findings; cytotoxicity to cells in a dish is not evidence of a cancer treatment.

Other preclinical findings

An in-vitro study of the leaves reported anti-arthritic activity (protein-denaturation method) of the ethanol extract at 500 µg/mL, comparable to diclofenac potassium in that assay, with brine-shrimp cytotoxicity LD50 values of 884–921 µg/mL (Myanmar Academy of Arts and Science study.pdf)). A review table of hepatoprotective plants lists C. oblongifolius aerial-part extracts tested against carbon-tetrachloride liver injury in animals (IJPSR hepatoprotective review).

What the evidence does not support

No human trial of nagadanti, for purgation, arthritis, liver protection, or cancer, was identified. None of the laboratory findings above justifies medicinal use in people, and the plant's traditional role as a drastic purgative is a safety concern, not a benefit claim.

Safety & contraindications

**Do not self-administer nagadanti. This is a practitioner-only plant, and even practitioner use requires traditional detoxification (śodhana) procedures.**

There are no human safety studies of Croton oblongifolius specifically. What is documented is the toxicity of its close relatives and genus:

Who must avoid it: everyone, except under direct supervision of a qualified Ayurvedic practitioner using properly processed material. Strictly avoid in pregnancy and breastfeeding (croton seeds are rated unsafe in pregnancy and can cause abortion, per NatMed Pro via WebMD). Keep all Croton plant material away from children, who are at risk of accidental ingestion (ESCTJ). Do not combine with any medication without medical supervision. In case of ingestion, seek emergency care immediately.

FAQs

What is nagadanti?

Nagadanti is Croton oblongifolius Roxb. (family Euphorbiaceae), an Ayurvedic plant of central, western and southern India extending to Bengal, traditionally used as a strong purgative (Khare dictionary). It is related to, but a different species from, the purging croton Croton tiglium (jayapala), and Ayurvedic sources equate its cathartic action with that of C. tiglium.

Is nagadanti the same as jayapala (Croton tiglium)?

No. They are different species in the same genus (Croton, Euphorbiaceae): nagadanti is C. oblongifolius and jayapala is C. tiglium. However, Ayurvedic sources equate nagadanti's purgative action with that of C. tiglium (Khare), so the severe safety warnings for croton seeds, unsafe orally, potentially fatal, apply by analogy. Swastik covers jayapala in a separate article.

Does nagadanti treat cancer or arthritis?

No. Cytotoxic diterpenoids from its bark, including croblongifolin, active against five human tumor cell lines, kill cancer cells only in petri-dish tests (Phytochemistry 2001; Molecules 2019), and a leaf extract showed anti-arthritic activity in one laboratory protein-denaturation assay (Myanmar Academy study.pdf)). None of this has been tested in humans, and none of it justifies medicinal use.

Can I take nagadanti as a laxative?

No: do not self-administer it. Croton species are drastic, potentially dangerous purgatives: oral use can cause vomiting, violent purging, dehydration and collapse, and croton seed oil can be fatal in small amounts (WebMD/NatMed Pro). Classical Ayurveda used such plants only after special detoxification processing and under expert supervision (PMC4264303).

Is nagadanti safe in pregnancy?

No. Croton seeds are rated unsafe in pregnancy, they can cause abortion, and unsafe during breastfeeding, per NatMed Pro's safety monograph (WebMD). Given that Ayurvedic sources equate nagadanti's action with that of Croton tiglium, the same prohibition applies by analogy. Avoid entirely; this applies to all Croton seed and oil products.

What should I do if someone ingests Croton seeds?

Treat it as a poisoning emergency: seek emergency medical care immediately and do not wait for symptoms to worsen. A six-year poison-control case series found gastrointestinal symptoms and dehydration most common after castor and croton seed ingestion, with a third of patients requiring ICU admission and children at particular risk of accidental ingestion (ESCTJ).

Sources

Disclaimer

This article is for educational purposes only and is not medical advice. Herbal products can interact with medications and are not suitable for everyone. Talk to a qualified healthcare practitioner before use — especially if you are pregnant, breastfeeding, managing a medical condition, or taking prescription medicines.