Shalmali: Traditional Uses, Evidence & Safety

TL;DR

Shalmali is the silk cotton tree, Bombax ceiba. Its gum, Mocharas, is one of Ayurveda's most-used astringents for bleeding, diarrhea, and dysentery. Classical references are extensive. Modern evidence is animal-only: leaf extracts improved wound healing in rats, and bark fractions lowered blood pressure in rats at doses that also showed toxicity. No human trials exist.

What it is

Shalmali (Bombax ceiba Linn., syn. Salmalia malabarica), family Malvaceae, is the red-flowered silk cotton tree of the Indian subcontinent: tall, straight-trunked, armed with conical thorns when young, unmistakable in spring when it flowers leafless.

Ayurveda uses several parts, and they are not interchangeable. The gum exudate is Mocharas (Mochras): a cooling, astringent, demulcent resin. The root bark and stem bark are hemostatic and astringent. The flowers are sweet, cooling, and traditionally hemostatic. The root, called Semal-musli, is treated as a nutritive tonic. Each part has its own job. The 2025 JAIMS review catalogues this part-by-part classical usage in detail (Harshit K et al., J Ayu Int Med Sci 2025).

Reported constituents include the flavonoid shamimicin, lupeol, mangiferin, tannins, and mucilage (Int J Green Pharmacy review).

Traditional use

Mocharas is the star. The 2025 review notes it as "one of the most reliable drugs for the treatment of hemorrhages, diarrhea, dysentery, bone fracture and irritable bowel syndrome" in the classical literature. It cites Ashtanga Hridaya Chikitsa passages. It appears in Pushyanug Churna for gynecological bleeding disorders (leucorrhoea, menorrhagia), in Bilvadi Churna and Kutajastak Avleha for diarrhea, and in Hriberadi Kwatha for pregnancy-related bleeding complaints (JAIMS review, 2025).

Other classical uses: stem bark in Chandanadi Taila for fever and Udumbaradi Taila for gynecological disorders. Flowers serve as a hemostatic in hemorrhoids. Root powder with milk is a nutritive tonic and aphrodisiac, and bark paste is applied to wounds in folk practice (JAIMS review, 2025).

Rasa-panchaka per the batch data: astringent taste (Kashaya), unctuous and heavy qualities (Snigdha, Guru), cooling potency (Sheeta), sweet post-digestive effect (Madhura vipaka). It pacifies Pitta and aggravates Vata and Kapha. These are traditional classifications, not clinical findings: the distinction matters on every page of this site.

What modern research says

Wound healing (animal study)

A 2018 study tested a methanolic extract of Bombax ceiba leaves as a 2% and 5% ointment in rat incision and excision wound models. Both concentrations significantly increased wound tensile strength and the 5% ointment produced 99% wound contraction by day 20 with faster epithelialization than controls (animal study, JMSCR 2018) (full text PDF).

This is consistent with the folk use of bark paste on wounds. It is still rats, not people, and the tested material was leaf extract, not the classical Mocharas gum.

Blood pressure effects (animal study, with a toxicity warning)

Saleem and colleagues isolated a stem-bark fraction (BCBMM, containing shamimicin-related constituents and lupeol) and tested it in rats. Intravenous 15 mg/kg caused a 65% fall in blood pressure; oral 200 mg/kg/day for five days produced a modest 13.18% reduction. But the toxicology was blunt: 1000 mg/kg/day killed all mice, and even 100 mg/kg/day killed some animals. The researchers concluded only low doses (below 100 mg/kg) might reduce blood pressure safely in mice (animal study, reviewed in eCAM overview).

Interesting pharmacology. The safety window is narrow, and nothing here translates to humans yet.

Antioxidant and liver-protective signals (in vitro and animal)

Mangiferin isolated from the plant showed free-radical scavenging comparable to rutin in DPPH assays. It also protected against carbon-tetrachloride-induced liver injury, supporting the antioxidant property in a living system (in vitro and animal work, Dar et al., 2005; reviewed in eCAM overview). Vieira et al. (2009) separately reported antioxidant activity of the methanolic extract.

What the evidence does not support (yet)

No human clinical trials of Shalmali or Mocharas were identified: not for diarrhea, bleeding, wound healing, or blood pressure. The classical indications rest entirely on textual authority and folk use. The animal findings are real but preliminary, and the hypotensive fraction's toxicity data argue for caution rather than enthusiasm.

Safety & contraindications

No human safety data for Shalmali or Mocharas were identified. The one cautionary signal comes from the animal toxicology above: a stem-bark fraction was lethal to mice at 100–1000 mg/kg/day. That is a different preparation from the traditional gum, but it is a reminder that "natural" and "harmless" are not synonyms for this plant.

The astringent tannins that make Mocharas useful for diarrhea can constipate with prolonged use: a traditional caution worth repeating. There are no data on pregnancy, breastfeeding, or drug interactions, despite classical use of Mocharas in pregnancy-related bleeding (which makes qualified supervision, not self-medication, the only responsible route).

FAQs

What is Mocharas?

Mocharas (Mochras) is the gum exudate of the Shalmali tree (Bombax ceiba). Ayurveda describes it as cooling, astringent, and demulcent, and uses it chiefly for bleeding disorders, diarrhea, and dysentery (JAIMS review, 2025).

What is Shalmali used for in Ayurveda?

Classically: the gum for hemorrhage, diarrhea, dysentery, and gynecological bleeding; bark preparations for fever and wounds; flowers as a hemostatic; root as a nutritive tonic. Traditional uses, not clinically proven effects.

Does research support Shalmali for wound healing?

In rats, a leaf-extract ointment improved wound contraction and tensile strength (JMSCR, 2018). No human studies exist. The folk practice of applying bark paste to wounds is consistent with the animal finding, but consistency is not confirmation.

Is Shalmali safe for blood pressure?

Unknown in humans. A bark fraction lowered blood pressure in rats but was lethal to mice at higher doses. Nobody should use Shalmali for blood pressure on this evidence. It is a toxicity signal, not a therapy.

Our editorial rule requires a pharmacopoeial or clinical-trial dose before stating one. No human trial of Shalmali establishes a dose, so we state none. Classical formulations containing Mocharas (like Pushyanug Churna) are dosed by practitioners, not by label-reading.

Annotated Sources

The classical-use survey is Harshit K et al., "Therapeutic Potential of Bombax ceiba Linn. – A Review," Journal of Ayurveda and Integrated Medical Sciences 10(9), 2025, which compiles Charaka, Sushruta, and Ashtanga Hridaya references part by part (PDF). The phytochemistry and part-wise constituent list (shamimicin, lupeol, mangiferin, tannins) come from the International Journal of Green Pharmacy review (PDF). The wound-healing study is the 2018 JMSCR trial of methanolic leaf extract in rat incision/excision models (PDF). The hypotensive and toxicology findings (Saleem et al., 2003; Dar et al., 2005; Vieira et al., 2009) are compiled in the peer-reviewed overview "Ethnomedicinal and pharmacological activities of Mochrus (Bombax ceiba Linn.)" (PDF).

Disclaimer

This article is for educational purposes only and is not medical advice. Shalmali's traditional uses for bleeding and diarrhea have no human-trial support, and animal toxicology of a bark fraction showed lethality at higher doses. Talk to a qualified healthcare practitioner before use — especially if pregnant, breastfeeding, managing a bleeding disorder or blood pressure condition, or taking prescription medicines.