Senna (Sonamukhi, Svarnapatri) — Ingredient Hub | Cassia angustifolia

Senna — Sonamukhi in India, Sana Makki in Unani, Svarnapatri in Sanskrit — is one of the world's oldest and most extensively documented medicinal plants. This hub is the canonical reference for the herb at Riddhish Herbals: its botany, classical Ayurvedic profile, phytochemistry, modern clinical evidence, the global trade in which India is the dominant producer, and a practical guide to using it well.

What is Senna?

Senna is a perennial under-shrub of the legume family whose dried leaves and pods contain anthraquinone compounds known as sennosides. These are the basis of its consistent, well-characterised laxative action. The species cultivated commercially in India is Cassia angustifolia, taxonomically now folded into Senna alexandrina; the older binomials Cassia acutifolia and Cassia senna are accepted as synonyms. “Tinnevelly senna” (Indian senna) and “Alexandrian senna” (Egyptian/Sudanese senna) refer to closely related plants of the same broad species.

Across pharmacopoeias, senna is one of the very few herbal medicines formally listed in the U.S., European and Indian official drug compendia. It is included in the WHO Monographs on Selected Medicinal Plants, the European Pharmacopoeia, the U.S. Pharmacopeia (Folium Sennae), the Indian Pharmacopoeia, the Ayurvedic Pharmacopoeia of India (as Svarnapatri), and the Unani Pharmacopoeia of India (as Sana Makki) [1][6].

Botanical profile

Names across languages

Ayurvedic profile

Unani profile

In Unani, senna is Sana Makki — one of the foundational laxatives (mushil) catalogued in the medieval Arabic medical formularies (Qarabadin). The 9th-century physicians Serapion the Elder of Baalbek and the Latin-known Mesue (Ibn Masawayh) recorded its purgative properties, and the Egyptian-Jewish physician Isaac Judaeus (c. 832–932) noted that the senna of Mecca was the finest grade. Senna is officially recognised in the Unani Pharmacopoeia of India under the Ministry of AYUSH [6].

Phytochemistry

Senna's pharmacology is led by a family of dianthrone glycosides called sennosides, principally sennosides A and B, with C and D and the closely related rhein, aloe-emodin, kaempferol and chrysophanol also present. Sennosides are large, water-loving molecules that are poorly absorbed in the small intestine. Carried intact to the colon, they are cleaved by gut bacteria to release rhein-anthrone, the active form that gently stimulates colonic muscle activity and influences fluid handling [5].

Indian senna leaf typically contains around 2.5–3.5% total hydroxyanthracene glycosides (calculated as sennoside B) in pharmaceutical-grade material; pods can run somewhat higher. The European Pharmacopoeia and U.S. Pharmacopeia set explicit minimum sennoside content thresholds for senna leaf and pods used in medicinal products.

Mechanism of action

1. Senna leaf or powder is ingested orally with water.
2. Sennosides A–D pass through the stomach and small intestine largely unabsorbed.
3. In the large intestine, colonic bacteria hydrolyse the glycosides, releasing rhein-anthrone.
4. Rhein-anthrone stimulates the muscular movement of the colon and modulates water and electrolyte handling.
5. This produces a soft bowel movement, typically 6–12 hours after ingestion.

This bacterial-activation step is exactly why senna is taken at night for next-morning relief, and why its effect is dependable rather than immediate.

Modern research

Senna is among the most thoroughly studied of all herbal laxatives. A randomised, placebo-controlled trial published in the American Journal of Gastroenterology compared senna with magnesium oxide in adults with chronic constipation, supporting its role as an effective stimulant option for short-term use [3]. The U.S. NIH LiverTox database describes senna as generally well tolerated when used as directed, while cautioning against prolonged high-dose use [4]. The American Botanical Council's HerbalGram herb profile, the WHO monograph on Folium Sennae, and comprehensive scientific reviews of Cassia angustifolia document its phytochemistry, pharmacology and cultivation in detail [1][2][5]. As always, study findings reflect investigational use and individual responses vary; nothing here is a promise of cure for any condition.

India and the global senna trade

India is the world's largest producer, supplier and exporter of senna leaves, pods and total sennosides. Cultivation is concentrated in three states: Rajasthan (around Jodhpur and Pali), Gujarat, and parts of Tamil Nadu — the historic Tinnevelly belt. From these dry, semi-arid belts, Indian senna reaches more than forty countries as raw leaves, pods, T-cut leaves, powders, extracts, tea-bag cut and standardised sennoside material.

Quality is graded principally by leaf size: Grade No. 3 is the workhorse of the pharmaceutical trade; No. 5 is also used medicinally; No. 1 (largest) is rarely cultivated in India as it is not commercially viable. To standardise this trade, India's Ministry of Agriculture established AGMARK grade designations for Tinnevelly senna leaves and pods as early as 1964 [1].

Senna is also one of the very few herbal medicines approved by the U.S. Food and Drug Administration for over-the-counter use, and it ranks among the most widely used herbal medicines in the United States — a striking footprint for a crop grown largely by small and marginal farmers on marginal land.

Traditional and modern uses

• Short-term, occasional relief from constipation.
• Pre-procedure bowel preparation in some clinical settings (under medical direction).
• Classical Virechana (deliberate purgation) protocols of Panchakarma, usually combined with other dravyas.
• Inclusion in compound digestive formulas such as Pet Nirogi Churna and other constipation-focused Ayurvedic combinations.

Traditional and ethnobotanical literature records additional historical uses; these are documented for educational interest and are not health claims.

How to use

Safety and contraindications

• Not for use during pregnancy or lactation.
• Not for children unless on specific medical advice.
• Avoid in intestinal obstruction, undiagnosed abdominal pain and inflammatory bowel conditions.
• Use only short-term; prolonged or excessive use can cause cramping and loss of fluids or electrolytes.
• Consult a qualified physician if you are on medication or managing any health condition.
• Keep out of reach of children.

Choosing a quality senna

Sennoside content depends on plant species, leaf grade, harvest and storage. A considered purchase should identify a single clear species (Cassia angustifolia), a stated plant part (leaf), proper storage advice (cool, dry, dark), and manufacture in a quality-controlled, GMP-standard facility. Riddhish Herbals Sonamukhi (Senna) Powder is a 100% single-herb, label-verified Senna leaf churna, produced in a GMP-, ISO 9001:2015- and HACCP-certified facility.

Frequently Asked Questions

What is Senna also called?

Senna is known as Sonamukhi (सोनामुखी) in Hindi, Gujarati and Marathi; Svarnapatri (स्वर्णपत्री) and Markandika in Sanskrit; Sana Makki (سنا مکی) in Urdu; Nilavarai (நிலாவாரை) in Tamil; Mindhiaval (મીંઢીઆવળ) in Gujarati. Its botanical name is Cassia angustifolia (syn. Senna alexandrina).

What part of the senna plant is used?

The dried leaf is the primary medicinal part. The pods are also used, often with somewhat higher sennoside content. The seeds and roots are not the laxative material.

What are sennosides?

Sennosides are anthraquinone glycosides — principally sennosides A, B, C and D — that are activated in the colon by gut bacteria. The active rhein-anthrone form gently stimulates colonic muscle activity, producing senna's characteristic 6–12-hour laxative effect.

Is Tinnevelly senna the same as Indian senna?

Yes. Tinnevelly senna is the trade name for Indian-grown Cassia angustifolia, originally cultivated in the Tirunelveli (“Tinnevelly”) district of Tamil Nadu from the mid-18th century. The crop is now grown mainly in Rajasthan and Gujarat alongside Tamil Nadu.

How is senna leaf graded?

Indian Tinnevelly senna is traditionally graded by leaf size from No. 1 (largest) to No. 5. Grade No. 3 is the workhorse of the pharmaceutical trade. India's AGMARK system, established in 1964, formally defined quality grades for senna leaf and pods.

How long does senna take to act?

About 6 to 12 hours. Because sennosides require activation by colonic bacteria, senna is usually taken at bedtime for next-morning relief.

Is senna safe?

When used at appropriate doses for short-term, occasional relief, senna is generally well tolerated. Excessive or prolonged use can cause cramping and loss of fluids or electrolytes. It is not for pregnancy, lactation or children without medical advice.

What's the difference between Senna alexandrina and Cassia angustifolia?

Modern taxonomy treats Senna alexandrina as the accepted species name, with Cassia angustifolia, Cassia acutifolia and Cassia senna as synonyms. Indian commercial senna is labelled Cassia angustifolia; Egyptian/Sudanese material is traded as “Alexandrian senna.” Both fall within the same broad species complex.

Where is most of the world's senna grown?

India is the world's largest producer, supplier and exporter of senna leaves, pods and sennosides. Cultivation is concentrated in Rajasthan, Gujarat and Tamil Nadu, and Indian senna is shipped to more than forty countries.

Can senna be used daily?

No. Senna is a stimulant laxative intended for short-term, occasional use. For ongoing daily bowel support, Isabgol (psyllium) and Triphala are more appropriate.

References

1. American Botanical Council. “Senna” herb profile, HerbalGram, Issue 120. herbalgram.org
2. Khan, T., et al. “An assessment, prospects, and obstacles of industrially important medicinal crop Indian Senna (Cassia angustifolia Vahl.): A review.” Journal of Ethnopharmacology, 2022. ScienceDirect
3. Morishita D., et al. “Senna Versus Magnesium Oxide for Chronic Constipation: A Randomized, Placebo-Controlled Trial.” American Journal of Gastroenterology, 2021;116(1):152–161.
4. National Institute of Diabetes and Digestive and Kidney Diseases (NIH). “Senna.” LiverTox. ncbi.nlm.nih.gov
5. World Health Organization. WHO Monographs on Selected Medicinal Plants — Folium Sennae / Fructus Sennae.
6. Ayurvedic Pharmacopoeia of India & Unani Pharmacopoeia of India — Svarnapatri / Sana Makki monographs (Ministry of AYUSH, Government of India).