Operculina turpethum

Other Names

AdimbuAluthi gidaArdhachandraArgyreia alata Montrouz.Argyreia alulata Miq.ArunaAve aveBangada balliBilitigadeCaralamChivakaCivataiConvolvulus anceps L.Convolvulus gaudichaudii ChoisyConvolvulus maximus BlancoConvolvulus riedlei ChoisyConvolvulus triqueter VahlConvolvulus turpethum L.Convolvulus turpethus L.Convolvulus ventricosus Silva MansoDevadantiDhdha kalamiDudholomoFénié ntitiFue vaoHe guo tengIndian jalapIpomoea altissima Mart. ex ChoisyIpomoea anceps (L.) Roem. & Schult.Ipomoea diplocalyx BakerIpomoea ornithopoda B.L.Rob.Ipomoea silvana ChoisyIpomoea triquetra (Vahl) Roem. & Schult.Ipomoea turpethum (L.) R.Br.Ipomoea turpethum var. anceps (L.) Miq.Ipomoea turpethum var. humilior HainesIpomoea ventricosa StellfeldKala NasottaraKalameshiKalaparniKalingikaKarum SivadaiKumbamKumbanjanKumbhadhatriKumpncanKumuda GandhiniKunagandiKuzhalkonnaLaghurochaniLiane blancheMalavikaMasuravidalaMasuriMerremia triquetra (Vahl) RobertyMerremia turpethum (L.) BojerMerremia turpethum (L.) RendleNagadantiNandiNasottaraNasttaraNishotarNishothNishothaNishothraNishotraNishottarNisodhaNisotarNisothNisottarNukpatarOperculina altissima (Mart. ex Choisy) Meissn.Operculina ornithopoda (B.L.Rob.) HouseOperculina triquetra (Vahl) Hallier f.Operculina turpetha (L.) Silva MansoOperculina turpethum var. heterophylla Hallier f.Operculina turpethum var. humilior (Haines) K.K.KhannaOperculina turpethum var. ventricosa (Bertero) Staples & D.F.AustinOperculina ventricosa (Bertero) PeterOperculine turpethumPaganraiPanilaParipakiniPithoriPitohriRechaniRochaniSahaSamaranSaraSaralaSaralamSaranaSarasaSarataSari bountakaSarlaSarvanubhutiSawrnabhutiShodhiniShweta trivritShyamaSivadaiSpiranthera turpethum (L.) BojerSt. Thomas lidpodSusheniSuvahaTarbalTarbudTegadaTegadeTellaTeudiTevudiThrikolpakonnaThrikoolpakkonnaTit rose de boisTrabalTransparent wood-roseTribhandiTrikolpo kannaTriputaTrivelaTrivritTrivritaTrivrittikaTrivrutTrivrut (Hindi)TurbitTurbudTurpethTurpeth rootTurpethumTurpethum australe Raf.Turpethum indicum Raf.TvuriUrbadVidalaViliTigadeWhite day glory盒果藤

Synopsis

Operculina turpethum (Turpeth / Indian Jalap / Trivrit)

1. Identity

1.1 Botanical and Chemical Names

Operculina turpethum (Linn.) Silva Manso belongs to the family Convolvulaceae — the morning glory family. It carries the accepted synonym Ipomoea turpethum (L.) R. Br. and is commonly known as Indian Jalap or Turpeth. In Sanskrit, the plant is designated Trivrit (also rendered Trivruta or Trivrit); it is also known as "Trivrit" in Sanskrit and "Nishottara" in Marathi. In the Unani system of medicine it is called Turbud. Additional vernacular designations recorded in South Asian traditions include Nisoth, Nishoth, Pitohri, and Kala Nasottara.

The name "Operculina" is derived from the Latin word "operculum," meaning lid or cover, which reflects the unique characteristics of its flowers.

1.2 Natural Source and Distribution

Operculina turpethum belongs to family Convolvulaceae, found throughout India at an altitude of about 1000 m, and commercially cultivated in Ceylon, tropical America, Mauritius, Philippines, Africa tropical region and Australia. The distribution of this plant is randomly found in tropical regions of India, America, Pakistan, Sri Lanka, China, Philippines, Bangladesh, Madagascar, Mauritania, and Africa.

It occurs in two forms, namely sveta and krishna, which are commonly known as white and black respectively. In Ayurvedic classification, Trivrit has two varieties: Aruna or Shweta (having whitish or reddish coloured root) and Shyama (having blackish root). The botanical name of Aruna or Shweta Trivrit is Operculina turpethum (L.) Silva Manso (syn. Ipomoea turpethum), and Shyama is Ipomoea petaloides Chois. There are two types of rhizome — the white rhizomes are mildly purgative, whilst the black rhizomes give drastic, often poisonous results.

The plant is a climbing perennial vine. Physically, Trivrit is a climbing perennial vine with heart-shaped leaves and slender, twining stems. The most valued part is its tuberous root — thick, irregularly shaped, muddy brown in exterior but white inside. Roots can grow up to 15 cm in length, adapting well to warm, humid regions across India and Sri Lanka.

1.3 Conservation Status

Operculina turpethum (L.) Silva Manso is a threatened medicinal plant belonging to the family Convolvulaceae. It is used in the Ayurvedic system of medicine and is popularly known as "Trivrit" or "Turbud." It has been attributed to contain numerous medicinal properties of high commercial value. However, rapid depletion of natural habitat has greatly reduced the distribution of this species and increased the risk of genetic diversity loss, such that much emphasis has to be laid on conservation of this medicinal species.

1.4 Plant Parts Used and Common Preparation Forms

Turpeth has long been in use in India as a purgative; it was officially acknowledged in the list of the Indian Pharmacopoeia only in 1946. Only the dried roots of the white variety with their undamaged bark find their place in that pharmacopoeia. The bark of the fresh root is also rubbed up with milk and administered as a purgative.

Common preparation forms include:

Churna (powder): Dried root bark ground to a fine powder, the most widely documented form in Ayurvedic practice.
Kwatha/Kashaya (decoction): Aqueous decoction of the root.
Lehyam/Avaleha (electuary): Trivrit Lehyam is a specialized Ayurvedic jam-like formulation crafted around the roots of Operculina turpethum (Trivrit); this lehyam blends potent laxative and digestive stimulants into a single syrupy paste, traditionally used to support gastrointestinal cleansing, manage constipation, and balance doshas.
Ghrita (medicated ghee): Preparations such as Trivritaadi ghrita, Trivritadi kwaatha, Abhyarishta, Kaishorgugglu, and Chandraprabha vati represent classical polyherbal compound formulations.

Operculina turpethum is an important medicinal plant whose root and stem tissues are found to be key ingredients in more than 135 herbal formulations in both Unani and Ayurvedic medicine systems.

2. Traditional and Historical Use

2.1 Ayurvedic Tradition

References to Operculina turpethum trace back to ancient Sanskrit texts — especially the Charaka Samhita and Sushruta Samhita. Scholars have found mentions of a vine called "Trivrit," praised as a Virechana dravya (cleansing agent).

In classical Ayurvedic texts like the Sushruta Samhita (circa 600 BCE), it is classified in the Shyamadi group and recommended for Virechana (therapeutic purgation) to eliminate toxins and balance doshas, particularly in conditions like fever, edema, and splenomegaly. The Charaka Samhita further describes its use in formulations for ascites due to Pitta imbalance, hemorrhoid treatment with Triphala churna, and skin diseases involving numb lesions, highlighting its role in Panchakarma detoxification therapies.

Aruna or Shweta Trivrit is considered the best amongst the herbs used for Virechana (therapeutic purgation). The Charaka Samhita records a large number of classical purgative formulations containing this plant: 110 formulations with the black variety of Trivrit (Operculina turpethum) are enumerated in its Sutrasthana chapter on purgatives.

Specific formulations documented in the Charaka Samhita include: Milk boiled with Trivrit and castor seeds (eranda) used in the treatment of ascites due to Pitta imbalance (Charaka Samhita, Chikitsa Sthana, 13th chapter). Trivrit (Operculina turpethum) along with Triphala churna for oral intake is cited as a remedy for hemorrhoids (Charaka Chikitsa Sthana, 14th chapter).

In the Ayurvedic understanding of the plant's qualities, the roots are described as bitter, acrid, sweet, thermogenic, purgative, carminative, anthelmintic, expectorant, antipyretic, hepatic, stimulant and hydragogue. They are indicated in colic constipation, dropsy, vitiated conditions of Vata, paralysis, myalgia, arthralgia, pectoralgia, bronchitis, obesity, helminthiasis, gastropathy, ascites, inflammations, intermittent fever, leucoderma, pruritus, ulcers, erysipelas, haemorrhoids, tumors, jaundice, ophthalmia, dropsical effusions, and rheumatism.

Classical Ayurvedic compound formulations containing Trivrit include: Trivritaadi Kwatha, Chandraprabha Vati, Trivritaadi Ghrita, Abhyarishtha, and Kaishoraguggulu.

2.2 Unani (Graeco-Islamic) Tradition

In Unani medicine, referred to as Turbud or Nisoth, the plant serves as a potent laxative for liver and bowel disorders, treating constipation, jaundice, obesity, and abdominal distension. It is popularly used in Unani medicine for the treatment of Qurooh (ulcers), Amraz-e-Asaab (neurological disorders), Qabiz (constipation), Wajae-Tams (dysmenorrhea), and Warm (inflammation). It has also been used since centuries in Unani medicine to treat Falij (paralysis), Waja al-Mafasil Balghami (phlegmetic joint pain), Malikholia (melancholia), Mania/Junoon (psychosis/insanity), Sara/Mirgi (epilepsy), Irq al-Nasa (sciatica), Sual muzmin (chronic cough), Waj al-sadar (chest pain), Zeeq al-Nafas (bronchial asthma), Istisqaa (ascites), and Bawaseer (piles).

According to Avicenna, use of Turbud along with zanjabeel (ginger) is more efficacious. It has been used as an important component in many compound formulations such as Itrifal Ustu-khud'dus, Itrifal Zamani, Itrifal Muqil, and Itrifal Mulaiyyin. Since ages, it has been mentioned as a useful component in many Unani pharmacopoeial formulations such as Itrifal Mulaiyyin, Habb-e-Ayarij, Habb-e-Suranjan, Habb-e-Muqil, Majoon Anjeer, and Jawarish Kamooni.

Turbud in combination with ginger and bitartrate of potash is noted as very effective for the removal of dropsical effusion.

2.3 Use in Traditional Medicine Beyond South Asia

Traditionally, Operculina turpethum has been used in a wide range of ailments such as gastrointestinal disturbances and asthma, and is found in China, South Asia, Pacific Islands, and Australia. Traditionally, its roots and stems have been used in a wide range of ailments including gastrointestinal disturbances such as gastric ulcer, diarrhoea, constipation, cough, asthma, splenomegaly, anaemia, tumors, raised lipid levels and obesity.

The Charaka Samhita describes the use of Rashayana such as Trivrutta Kashya (herbal decoctions) as dietary supplements for the brain and neurological activity. Ashwagandharishta, Saraswatarishta, and Saraswata Ghrita are well-known polyherbal formulations containing Trivrit used for brain disorders.

3. Key Constituents and Active Compounds

3.1 Resin Glycosides — the Primary Actives

The most prominent constituent is turpethin, a glycosidic resin constituting approximately 5–10% of the root bark's dry weight, known for its purgative properties and structural similarity to resin glycosides found in related Ipomoea species such as jalapine and convolvulin. This resin is insoluble in non-polar solvents like ether and benzene but soluble in alcohol, and upon acid hydrolysis it yields turpetholic acid along with glucose and fructose.

Resin glycosides are unique secondary metabolites in the plant kingdom confined to the morning glory family (Convolvulaceae). They are the principles responsible for the purgative action of all the important Convolvulaceous species used in traditional medicine throughout the world. They have also been reported to have other various biological activities, including being haemolytic, antibacterial, antifungal, plant growth regulatory, and cytotoxic.

Five resin glycosides were obtained from the aerial parts of Operculina turpethum in one structural study. Associated with turpethin are turpethinic acids (A through E), isolated in substantial quantities from the resin fraction, which contribute to the plant's laxative effects. The root bark of Trivrit is rich in turpethum resin consisting of 10% turpethin, which is a glycoside analogue of Jalapine and Convolvulin and is insoluble in ether, benzene, carbon sulphide, and essential oils. Under the action of alkaline bases, turpethin is transformed into turpethic acid, while it is converted into turpetholic acid, glucose, and fructose in the presence of hydrochloric acid.

3.2 Dammarane-Type Saponins (Operculinosides)

From the aerial parts of Operculina turpethum, four new dammarane-type saponins — operculinosides A–D (1–4) — were isolated; these showed particular hepatoprotective activities. The bark and root are also wealthy in turpethosides A and B in addition to operculinosides A, B, C, and D.

3.3 Coumarins and Phenolics

Coumarins, particularly scopoletin (a coumarin glycoside), are another key class of compounds, present in the roots and seeds at varying concentrations — ranging from 0.212% to 0.271% dry weight in wild root barks. The root also contains coumarin, scopoletin, glucose, rhamnose, and fucose.

3.4 Terpenoids, Sterols, and Other Compounds

The herb was found to be a potent source of bioactive compounds such as α- and β-turpethein, turpethinic acids (A, B, C, D, and E), coumarins, cycloartenol, lanosta-5-ene, 24-methylene-δ-5-lanosterol, α- and β-rhamnose, β-sitosterol, lupeol, scopoletin, betulin, acrylamide, stigma-5,22dien-3-O-β-D-glucopyranoside, β-sitosterol-β-D-glucoside (H-1), 22,23-dihydro-α-spinosterol-β-D-glucoside (H-2), and salicylic acid (CH-2).

The major phytochemical constituents as reported by multiple studies include phenol, flavonoid, phytosterol, terpenoid, cardiac glycosides, resin, glucoside, turpethinic acid, volatile oil, scopoletin, triterpenes, and sitosterol.

In summary, the phytochemical profile of Operculina turpethum as established by preliminary phytochemical investigations spans: glycosides (scopoletin, turpethinic acids [A–E]), terpenoids (lupeol, betulin), reducing sugars, alkaloids, saponins, steroids, tannins, flavonoids, coumarins, and operculinosides A–D in different extracts.

3.5 Mechanism of Purgative Action

The cathartic properties of Operculina turpethum stem from resin glycosides in the root, such as turpethin, which stimulate intestinal peristalsis by irritating the mucosal lining and promoting fluid secretion. Turpethin is mainly responsible for the purgative action of Trivrit.

The pharmacological actions of the plant may be largely attributed to the presence of turpethin and turpethinic acids (A–E) in high quantity.

4. Scientific Evidence by Area of Use

Important note on evidence levels: The overwhelming majority of available evidence for Operculina turpethum derives from preclinical (animal and in vitro) studies. There is a substantial absence of well-designed, large-scale randomised controlled trials (RCTs) in human populations. Where clinical or human-level evidence exists, it is noted explicitly; all other study types are identified as preclinical.

4.1 Gastrointestinal Function: Cathartic / Purgative / Laxative Activity

Evidence level: Preclinical (animal) and traditional; no high-quality human RCT data identified.

In a mouse model, oral administration of ethanolic root extract (100–400 mg/kg) significantly increased fecal output and reduced transit time in a dose-dependent manner compared to controls, confirming potent cathartic activity without overt toxicity. This aligns with observations in rat studies where the extract enhanced bowel motility, supporting its traditional use as a purgative while underscoring the need for human pharmacokinetic data.

The cathartic mechanism at the organ level involves mucosal irritation and stimulation of fluid secretion into the intestinal lumen by resin glycosides. As a purgative classified in the Indian Pharmacopoeia, Turpeth has long been in use in India as a purgative; it was officially acknowledged in the list of the Indian Pharmacopoeia only in 1946.

4.2 Antidiarrhoeal, Antispasmodic, and Bronchodilator Activity

Evidence level: Preclinical (animal and isolated tissue); no human trial data identified.

A study published in BMC Complementary Medicine and Therapies (2014) investigated the antidiarrhoeal, antispasmodic, and bronchodilator effects of the 70% aqueous-ethanolic extract of Operculina turpethum black variety (OTB) using established preclinical models. Castor oil-induced diarrhoeal mice model and isolated tissue preparations such as rabbit jejunum and guinea-pig tracheal preparations were used to test the antidiarrhoeal, antispasmodic, and bronchodilator effects and the possible mode of action(s).

In the castor oil-induced diarrhoea in mice, the crude extract of OTB caused a dose-dependent (300–1000 mg/kg) protection from diarrhoea, similar to that of loperamide. In isolated rabbit jejunum preparations, OTB produced a dose-dependent inhibition of spontaneous and high K⁺ (80 mM)-induced contractions with resultant median effective concentrations (EC₅₀ with 95% confidence interval) of 1.04 mg/ml (0.59–1.54) and 0.12 mg/ml (0.10–0.15; n = 4) respectively, thus showing more potency against K⁺. Pretreatment of the tissue with OTB (0.01 and 0.03 mg/ml) caused a rightward shift in the concentration response curves of Ca²⁺, similar to that of verapamil.

In isolated guinea-pig tracheal preparations, OTB caused inhibition of carbachol and high K⁺-induced constriction at similar concentrations with respective EC₅₀ values of 0.66 mg/ml (0.53–0.82) and 0.59 mg/ml (0.45–0.62). Activity-directed fractionation revealed that the ethyl acetate fraction was more potent than the parent crude extract and hexane fraction.

The antidiarrhoeal, antispasmodic, and bronchodilatory activities of the crude extract and its organic fractions are mediated through the blockade of Ca²⁺ channels, thus providing a possible pharmacological base to its medicinal use in diarrhoea, gut spasms and asthma, though additional mechanism(s) cannot be ruled out.

4.3 Antiulcer Activity

Evidence level: Preclinical (animal); no human clinical trial data identified.

A study published in Evidence-Based Complementary and Alternative Medicine (2013, PMID: available via PMC3582069) by Ignatius et al. evaluated ulcer prevention and protection using the aspirin + pylorus ligation (APL) model in experimental rats. Ulcer preventive and ulcer protective activities of HAOP (hydroalcoholic) and MOP (methanolic) stem bark extracts of Operculina turpethum (100 mg/kg body weight, orally) were evaluated employing the aspirin + pylorus ligation (APL) model in experimental rats. The results suggested that both extracts possess enhanced ulcer preventive and protective activities when compared with the standard drug ranitidine. HAOP showed more pronounced effect when compared to MOP. Further, the results of histopathological and biochemical studies also confirm the potent ulcer preventive and protective nature of both extracts.

Specific protection rates recorded in this study were: Treatment with MOP and HAOP showed significant protection against ulcers in pretreatment (76.53% and 81.32%) and posttreatment (54.21% and 60.13%) at a dose of 100 mg/kg (P < 0.001) when compared with the control animals, respectively. The standard drug ranitidine showed significant protective effects against ulcers (65.14%) at a dose of 50 mg/kg in the same model. These results are preclinical and require confirmation in human studies.

4.4 Hepatoprotective Activity

Evidence level: Preclinical (animal and in vitro); no human clinical trial data identified.

The ethanolic extract obtained from roots of Operculina turpethum was evaluated for hepatoprotective activity in rats by inducing liver damage by paracetamol. The ethanol extract at an oral dose of 200 mg/kg exhibited a significant protective effect by lowering serum levels of glutamic oxaloacetic transaminase, glutamic pyruvic transaminase, alkaline phosphatase, and total bilirubin. These biochemical observations were supplemented by histopathological examination of liver sections.

From the aerial parts of OT, four new dammarane-type saponins — operculinosides A–D (1–4) — were isolated and showed particular hepatoprotective activities in preclinical testing. Preclinical studies suggest that these compounds may exhibit anti-inflammatory, antioxidant, hepatoprotective, and immunomodulatory effects. Some animal studies have indicated potential benefits in alleviating liver injury and reducing oxidative stress.

4.5 Antidiabetic Activity

Evidence level: Preclinical (animal and in vitro); note — one relevant PMC article was retracted; results should be interpreted with caution.

An in vitro/in vivo study accessed via PMC (PMC8172823, subsequently retracted) investigated the antidiabetic potential of Operculina turpethum fractions. The study aimed to investigate acute toxicity and antidiabetic potential (in vitro and in vivo) at the fraction level. The plant was fractionated into a flavonoid fraction (OTFF), tannin fraction (OTTF), and saponin fraction (OTSF). In vitro alpha-amylase inhibition assay revealed that OTFF was found to be more potent than standard Acarbose. Given the retraction of this article, its specific numerical results cannot be reliably cited.

Other preclinical evidence includes comparative studies of methanolic extract against streptozotocin-induced diabetic rats referenced in the literature, with turpethinic glycosides and scopoletin-containing roots showing antidiabetic, antipyretic, anti-inflammatory, antioxidant, anti-cancer, antimicrobial, antiproliferative, and stimulant properties in preclinical models.

4.6 Anti-Inflammatory and Analgesic Activity

Evidence level: Preclinical (animal); no human clinical trial data identified.

Studies indicate a notable dose-dependent effect in analgesic and anti-ulcer activities of Operculina turpethum extracts. Preclinical analgesic studies used standard mouse models with different solvent extracts of aerial parts and roots. Anti-inflammatory preclinical studies similarly used standard rat paw oedema models. One review of the literature noted a 36.45% reduction in edema in rat models following treatment with a standardized extract, pointing to significant anti-inflammatory potential in preclinical settings.

4.7 Antimicrobial Activity

Evidence level: Preclinical (in vitro); no human clinical trial data identified.

Ethanolic extract of this drug showed antimicrobial activity against Pseudomonas aeruginosa, Klebsiella, E. coli, and Staphylococcus aureus. The resin glycosides, which are known to be active against bacteria and fungi in isolated tissue models, are considered the primary contributors to these effects. The plant was found to have encouraging antimicrobial, antihepatic, antinephrotoxic, antiulcer, antidiarrhoeal, antidiabetic, cytotoxic, analgesic, anti-arthritic, and anti-inflammatory activities across accumulated preclinical work.

4.8 Anthelmintic Activity

Evidence level: Preclinical (in vitro and in silico); no human clinical trial data identified.

A study published in In Silico Pharmacology (Springer, 2025) applied integrated computational and in vitro approaches to the anthelmintic potential of Operculina turpethum. The petroleum ether extract (PE) showed the most promising anthelmintic activity compared to other extracts and in comparison to the standard drug. LC–MS identified viniferifuran (VIN) and arbutin (ARB) in the PE extract. VIN exhibited the highest binding affinity (−6.1 kcal/mol) compared to the standard (−2.4 kcal/mol) and GABA ligand (−2.9 kcal/mol) in docking studies. In silico ADMET analysis predicted VIN to be non-carcinogenic and non-mutagenic. These findings are preliminary and limited to computational and in vitro settings.

4.9 Anticancer / Cytotoxic Activity

Evidence level: Preclinical (in vitro and in silico); no human clinical trial data identified.

One study titled "Secretome analysis of breast cancer cells to identify potential target proteins of Ipomoea turpethum extract-loaded nanoparticles in the tumor microenvironment" (Swami et al., 2023, Frontiers in Cell and Developmental Biology) explored the anticancer potential of nanoparticle-loaded plant extract against breast cancer cell lines. Resin glycosides are documented to exhibit cytotoxic properties in the Convolvulaceae family broadly, as summarised in phytochemical reviews. All anticancer evidence at present is strictly preclinical.

5. Body Systems and Health Areas Associated with Operculina turpethum

The plant possesses numerous documented preclinical properties, including anti-diabetic activity, anti-inflammatory activity, antisecretory and ulcer protective activity, hepatoprotective activity, hypolipidaemic activity, antimicrobial activity, anticancer activity, analgesic activity, immunomodulatory activity, anti-haemolytic activity, anti-arthritic activity, antioxidant activity, antidiarrhoeal, antispasmodic, bronchodilator activity, laxative activity, and larvicidal activity.

These properties map onto the following body systems:

Gastrointestinal system: Primary traditional use; purgation, constipation, antidiarrhoeal, antispasmodic, antiulcer, ascites, haemorrhoids.
Hepatobiliary system: Hepatoprotective, jaundice, liver disorders; operculinosides A–D demonstrated hepatoprotective activity.
Respiratory system: Traditional use in asthma and bronchitis; preclinical Ca²⁺ channel blockade provides a mechanistic basis for bronchodilation.
Musculoskeletal / rheumatic system: Traditional use in arthralgia, myalgia, gout, and rheumatism; preclinical anti-arthritic data from Freund's complete adjuvant models.
Endocrine / metabolic system: Preclinical antidiabetic and hypolipidaemic data; traditional use in obesity.
Integumentary system: Traditional use in skin disorders including leucoderma, eczema, and allergic dermatitis.
Neurological system: The Charaka Samhita describes use of Trivrutta Kashya as dietary supplement for the brain and neurological activity; Saraswatarishta and Saraswata Ghrita are polyherbal formulations containing Trivrit used for brain disorders.
Immune system: Preliminary immunomodulatory activity in preclinical studies.

6. Dosage Forms and Dosages Reported in Studies

The following dosages are stated as reported in peer-reviewed sources and Ayurvedic pharmacopoeial references; they do not represent recommended clinical doses.

Ethanolic root extract (hepatoprotective study in rats): Oral dose of 200 mg/kg exhibited a significant protective effect against paracetamol-induced hepatotoxicity.
Aqueous-ethanolic extract (antidiarrhoeal study in mice): Dose-dependent protection from diarrhoea at 300–1000 mg/kg.
Stem bark extracts (antiulcer study in rats): MOP and HAOP stem bark extracts administered at 100 mg/kg body weight, orally.
In vitro antidiabetic fractionation: Plant fractions evaluated by MTT assay at concentrations ranging from 100 to 1000 µg/ml.
Traditional Ayurvedic dosage (root bark powder): In children, a minimal dosage of 125–250 mg is cited in traditional references.

No large-scale human clinical studies have established a standardised human dosage range based on rigorous pharmacokinetic data at the time of this writing.

7. Safety Considerations and Toxicology

7.1 Known Adverse Effects

Operculina turpethum root, if used excessively or in people with low bodily strength, causes burning sensation, dizziness, twitching pain of the abdomen, and severe purgation. In most Ayurvedic formulations, root bark only is used in place of the whole root. To avoid side effects, it is usually used in combination with ginger, dill seeds, rock salt, or sugar candy.

7.2 White vs. Black Variety: Differential Toxicity

There are two types of rhizome — the white rhizomes are mildly purgative, whilst the black rhizomes give drastic, often poisonous results. The Indian Pharmacopoeia admits only the white variety's dried root with undamaged bark, only the dried roots of the white variety with its undamaged bark find their place in the Indian Pharmacopoeia.

7.3 Preclinical Toxicology

Few toxicity studies done in rodents have confirmed the safety of both crude powder and extract of O. turpethum at moderate doses. However, all fractions were evaluated for their safety profile, and biochemical, haematology, and histopathology results exhibit that the flavonoid fraction (OTFF) produces mild toxicity at organ level at a concentration of 2000 mg/kg in albino mice. This finding underscores the need for caution at very high doses and the importance of appropriate extraction and standardisation of preparations.

7.4 Pregnancy and Special Populations

It is best avoided during pregnancy and lactation. This is consistent with the strong purgative action of the resin glycosides, which could theoretically induce uterine contractions or fluid and electrolyte imbalance. This contraindication is based on traditional Ayurvedic cautions and has not been formally evaluated in human reproductive safety studies.

7.5 Conservation Status as a Safety-Adjacent Issue

The plant Operculina turpethum is endangered, which prompts attention to protect it from extinction. Misidentification and substitution with other species in commercial preparations present a practical risk, as different species — particularly the black variety — can produce dramatically more drastic purgative effects. Pharmacopoeial standards requiring undamaged dried root bark of the white variety specifically address this concern.

7.6 Drug Interactions

No human pharmacokinetic drug interaction studies for Operculina turpethum were identified in the peer-reviewed literature at the time of this writing. Given the documented Ca²⁺ channel antagonist-like mechanism observed in isolated tissue studies (antidiarrhoeal and bronchodilatory activities mediated through the blockade of Ca²⁺ channels), a theoretical interaction with calcium channel blocking medications or other smooth muscle–active drugs cannot be excluded, but this remains unverified in clinical settings. The strong purgative action of turpethin implies potential for fluid and electrolyte disturbance if combined with diuretics or other agents affecting electrolyte balance.

References

Health Conditions

Health conditions that Operculina turpethum may help support.

No conditions available.

Body Systems

Body systems that Operculina turpethum may help support.

No body systems available.