|English||French cotton, Mudar plant, Calotropis, Rubber Bush, Apple of Sodom, Mudar, Madar, King’s Crown, Rooster tree|
Akra, Alarka (Sanskrit); Madar (Hindi)
|English||Dead Sea Apple, Milkweed, Sodom apple, Swallow-wort, Indian milkweed, King’s crown kapok|
Torcha, Touza, Ngeyi
Calotrope, Fatetone, Pomme de Sodome
Wahre Mudarpflanzer, Gomeiner
Algodon extranjero, Cazuela
Calotropis procera is a member of the Asclepiadaceae family. It is a medium sized shrub or small tree that grows up to 4 m high with a generally waxy appearance and copious milky sap. The stem is grey-green in colour, smooth, rather crooked and covered with thick corky bark, branching sometime almost from the base. The leaves are grey-green, opposite, alternating, waxy, thick and rounded-ovate. They measure 5-15 cm x 4-10 cm with a short pointed tip and a heart-shaped base partly clasping the stem; a stiff brush of hairs occur at the base of the midvein. The flowers are white with deep purple blotch at the base of each lobe and deep purple scales between the petals and the stamens; more or less tubular, 5-lobed, measure 2-3 cm across, devoid of milky sap. They are grouped in umbels in which the outer flowers open first while the inner do not develop fully. The fruit is a grey-green bladdery pod measuring 8-12 cm long, rounded at the base but shortly pointed at the tip and containing numberous seeds. The seeds are brown, flattened, with a tuft of long white hair at one end.
Plant Part Used
Akundaric acid; akundrol; akundarol isovalerate; calotropin; caoutchouc; madaralbum; madarfluavil; mudaric acid; mudarine; mudarol isovalerate; mudrol; pekilocerin A; silver salt; uscharidin; uzarigenin; uzarigenin 3-O[b-D-glucopyranosyl-(1->2)-b-D-glucopyranoside]; voruscharin;   
Powdered root of C. procera had been used as a remedy for dysentery but traditional practitioners warn of the prevailing side effects which are very much similar to those of ipecacuanha i.e. vomiting and depression with bilious stools. Some advocate the use of tinctures of the roots, however, it seems that the powdered root is superior in its effects. In Gambia, the young leaves boiled in water and mixed with cook rice seem to be the remedy for dysentery. The root bark is regarded as an excellent medication for colic and stomach problems in some African countries; in Sudan it is used for jaundice. For intestinal worm infestation, the Kusasi of Ghana make a salve from root and leaf ash with shea butter that is rubbed into scarifications on the abdomen of children. Unani medicine advocate the use of the roots to treat haemorrhoids, tape worms and the root decoction is used to treat ancylostomiasis (worm disease).  
Asthma is treated by using either the flowers or the roots in a decoction. A decoction of the leaves is given to relieve cough. For whooping cough the leaves are boiled with Momordica charantia and the decoction is drank a glassful each time. The root is also good for asthma and cough according to Unani medicine. In Egypt the dried leaves are smoked in pipes for relieving cough. 
C. procera is popularly used to treat leprosy in Africa. Various methods had been employed for this. In Bamako, the patient is bathed with an 8-day macerate, and in Senegal the patient is given a diluted decoction of the roots. The Gambians uses the juice of the boiled leaves as a remedy for leprosy. There are others who advocate the writing of Quranic verses on the leaves before boiling. The root is also used in the treatment of venereal diseases like gonorrhea and syphilis. In these cases the root or root bark is fermented in honey and given to the patient to drink.
Other usesA remedy for snake bite is to take the root with black pepper in the dose of 5 to 10 grains. For women with hypermenorrhoea the dried leaves are used to control the bleeding while in cases of amenorrhoea a decoction of the leaves mixed with shea butter is given. In cases of dystochia a little of the powdered roots mixed in water is prescribed to be given 15 minutes after delivery. In Sudan the latex is used to procure abortion. The stem bark is considered an aphrodisiac while the dried flowers is a remedy for impotency. The Nubians made use of the latex to cure toothache and to loosen the tooth to facilitate extraction; the Pathans on the other hand used fresh roots as toothbrush to prevent and cure toothache. Circulatory and cardiac problems are treated with diluted extract of the root bark. An infusion of one leaf in one glass of water is drunk against arterial hypertension. 
The flowers, the roots and the latex of C. procera all have anti-inflammatory activities. This fact had been proven a few studies.   Study concluded that the anti-inflammatory effects of dried latex of C. procera was due to its ability to inhibit histamine and bradykinin and partially inhibiting prostaglandin E2. Another study identified the active anti-inflammatory compound to be protein in nature. They found that the protein was able to inhibit neutrophi migration induced by carrageenin. On the basis of this they suggested that in inhibitory effect of the latex is likely to be cell-mediated. Reports concurred with this finding and suggested that this effect is mediated through NO production.
Antipyretic, analgesic and neuromuscular blocking activity
Study on the analgesic and antipyretic effects of their ethanolic extract of the flowers of C. procera. By using the ethanol extract of the plant to show a significant antipyretic, analgesic and neuromuscular blocking activity. Two studies  focused on the analgesic properties of the dry latex. They showed that the anti-nociceptive effect was not dependent on the opiod system.
Study found that the aqueous extract of the stem bark was able to suppress cough induced by bronchial irritation by ammoniac in Guinea pig.
The chloroform fraction of C. procera root extract showed significant anti-ulcer activity against aspirin, indomethacin, ethanol, indomethacin + ethanol and stress-induced ulceration. Study found that the extract not only inhibit gastric secretory volume and total acidity, it also inhibited arachidonic acid metabolism making the inhibition of 5-lipoxygenase as a probable mechanism for its anti-ulcer activity. Bharti S et al found that the dried latx of C. procera has the therapeutic potential to relieve gastric hyperacitidy and to prevent gastric ulceration induced by necrotizing agents.
A single dose of dry latex of C. procera was able to significantly decrease the frequency of defaecation, the severity of diarrhea and afforded protection from diarrhea in 10% of rats treated with castor oil. This was achieved through reduction in intestinal transit and inhibition of castor oil induced intestinal fluid accumulation.
Wound healing activity
Study of application 20 microl of 1% sterile solution of the latex of C. procera on full thickness wound of rats twice daily for 7 days. They found that there was augmentation of healing process through marked increase in collagen, DNA and protein synthesis and epithelisation leading to reduction of wound area.
Studies involving ethanol and aqueous extracts of C. procera roots to study their effect on oestrous cycle and on some parameters of oestrogenic functionality in rats. There was evidence of interruption in normal oestrous cycle by both extracts through prolongation of the dioestrous stage of the oestrous cycle with consequent temporary inhibition of ovulation. Another study found their ethanol extract of the roots did not show andy antioestrogenic activity, however, there was evidence of strong anti-implantation and uterotropic activity at dose level of 250mg/kg.
Study found that by pretreating albino rats with 300 mg/kg of ethanol extract of latex of C. procera thrice daily for 30 days, there was significant reduction in the elevated marker enzyme levels in serum and heart homogenates in isoproterenol-induced myocardial infarction. Histopathological studies showed a marked protection by the extract against myocardial necrotic damage.
Smooth muscle relaxant activity
Study reported earlier the ability of their ethanol extract to induce smooth muscle relaxation. Another studydemonstrated similar activity with their ethanol extract of the plant. They believe this could be through direct relaxant action on the smooth muscle. Studies found that the oral administration of dry latex decreased intestinal transit time and also decrease intestinal content. At lower doses there was a dose-dependent contractions of gastrointestinal smooth muscles that was followed by desensitization at higher doses.
Study on the effects of the dry latex of C. procera on the blood glucose levels in alloxan-induced diabetic rats. Daily oral dose of the dry latex at 100mg/kg and 400mg/kg reduced the blood glucose level and increased hepatic glycogen content. At the same time it also prevented the loss of body weight and reduced daily water consumption to normal rat’s levels.
A number of workers studied the hepatoprotective activity of C. procera. Both studies  on the effects of their ethanol extracts of the flowers against liver damage induced by CCl4 and paracetamol respectively. Their results were similar i.e. there was reduction of the biochemical markers of hepatic injury (serum glutamate pyruvate transaminase, serum glutamate oxaloacetate transaminase, alkaline phosphatase, bilirubin, cholesterol, HDL and tissue glutathione (GSH) levels.). The presence of quercetin related flavonoids could be play a role in this hepatoprotective activity. Padhy et al working on the latex also found liver protective activity in it.
The roots and latex of Calotropis proce C. procera exhibited cytotoxic activity. In their studies of the methanol extracts of the roots Van Quaquebeke managed to isolate cardenolide which had antitumout activity together with inhibitory influence on the Na+/K+ ATPase activity. Cardenoline was found to be active against 57 human cancer cell lines. Mathur et al found their root extracts were active against Hep2 cells and this is due to its ability to cause apoptosis and disruption of cell cycle at S phase preventing cells from entering G2/M phase. Choedon et al found that their methanol extract of the latex could protect their X15-myc tansgenic mice against hepatocarcinogenesis without any adverse effects. There was extensive cell death in both Huh-7 and COS-1 cells with extensive fragmentation of DNA in both. The laticifer proteins (LP) isolate from the latex showed considerable cytotoxic activity on SF295 and MDA-MB-435 cell lines. LP was found to express its cytotoxic activity through inhibition of DNA synthesis by alteration in the topology of DNA. It was also found to inhibit topoisomerase I activity.
Antimicrobial activityStudy had earlier reported the antibacterial activity of their ethanol extracts of the flowers of C. procera a. It could inhibit the growth of both Gram-positive and Gram-negative bacteria. Another study  found the Calotropis procera had the most effective antibacterial properties as compared to other Morocan medicinal plants they studies.
Toxicity studies of latex of Calotropis procera
The latex has a direct irritant action on the mucous membrane particularly in the eye. Skin reactions to this plant may be caused by allergy rather than to a direct irritant action. All parts of the plant contain a cardioactive steroid and calcium oxalate crystals. Toxin: An unidentified vesicant allergen in the latex, calcium oxalate crystals and cardioactive steroids resembling digitalis.
Clinical Findings: Human intoxication from this plant have been reported in modern times. Ingestion of calcium oxalates causes a painful burning sensation of the lips and mouth. There is an inflammatory reaction, often with oedema and blistering. Hoarseness, dysphonia and dysphagia may result. Poisoning would be expected to produce clinical findings typical of cardioactive steroids. Toxicity has a variable latent period that depends on the quantity ingested. Dysrrhythmias include sinus bradycardia, premature ventricular contractions, atrio-ventricular conduction defects, or ventricular tachydysrhythmias. Hyperkalemia, if present, may be an indicator of toxicity.
Management: Calcium oxalate toxicity: the pain and oedema recede slowly without therapy. Cool liquids or demulcents held in the mouth may bring some relief. Analgesics may be indicated. The insoluble oxalate in the plants does not cause systemic oxalate poisoning.Cardioactive steroid toxicity: Gastrointestinal decontamination as appropriate, serial electrocardiograms, and serum potassium determinations should be performed. If serious cardioactive steroid toxicity is considered, digoxin-specific Fab should be administered. Consultation with a Poison Control Center should be considered.
Adverse Effects in Human:
A report of adverse reaction to the drug was made by Behl et al. A 76 year old male developed severe dermatological lesions of the skin and mucous membranes following ingestion of burnt leaves of C. procera for two weeks. The lesions appeared as flaccid blisters on non-inflammatory base over the back with eroded and crusted lesions ocvee the rest of the body. Nikolsky’s was positive. Lesion developed from the mouth spreading all over the body except the palms and soles; genital and conjuctival mucosae.C. procera induced keratitis was reported by a number of workers.    The clinical picture of this keratitis include painless dimness of vision with photophobia, conjunctival congestion and mild to severe corneal oedema. This could subsequently lead to epithelial defect, iridocyclitis and secondary glaucoma as complications. All workers agreed that this is reversible provided the latex did not penetrate the corneal stroma and induce permanent loss of endothelial cells. Treatment with local steroid drops seems to be the best way of handling this situation. Basak et al advocate to use anti-glaucoma agents, cycloplegics, hypertonic saline and tears supplement to address any prevailing complications.
Used in Certain Conditions
Pregnancy / Breastfeeding
Neonates / Adolescents
Chronic Disease Conditions
Interactions with drugs
Interactions with Other Herbs / Herbal Constituents