Cassia fistula

BotanicalBest before bed

What is it

Cassia fistula (Indian laburnum, amaltas, aragwadha) is a tree native to South Asia. Its fruit pulp is widely used in Ayurvedic medicine as a gentle laxative; bark, leaves and flowers are used for various other indications.

Evidence for 1 use

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Constipation (traditional)

Limited Evidence

Traditional and clinical use as a laxative is supported by anthraquinone content.

How it works

Cassia fistula fruit pulp contains anthraquinone glycosides (sennosides and others) that act as stimulant laxatives by increasing colon motility and water secretion in the intestine. This produces a mild to moderate laxative effect 6-12 hours after ingestion. Unlike senna, cassia fistula pulp is considered milder and is traditionally used even in children and during pregnancy in classical Ayurveda (though modern guidance advises caution). The fruit also contains pectins, sugars and tannins.

Dosage

Ayurvedic: 5-10 g of fruit pulp per dose, taken at bedtime as needed for constipation.

When and how to take it

Traditionally taken at bedtime for morning effect.

1 commercial form

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Fruit pulp (amaltas)

Used as gentle laxative.

Traditional Ayurvedic form.

Safety

Generally well tolerated for short-term use. Chronic stimulant laxative use can lead to dependence and electrolyte imbalance. Mild abdominal cramping common.

Who should be cautious

Avoid in intestinal obstruction, severe dehydration. Use cautiously in pregnancy despite traditional use; modern guidance favors safer alternatives.

Interactions

May reduce absorption of oral medications. May enhance effects of loop and thiazide diuretics due to potassium loss.

Frequently asked questions

Is Cassia fistula a stimulant laxative?⌄

Yes, it contains anthraquinone glycosides like senna, but at lower concentration.

Is it safe in pregnancy?⌄

Traditional use exists, but modern guidance favors gentler bulk-forming or osmotic laxatives in pregnancy.

References

Cassia fistula on Wikidata — Wikidata link

Cassia fistula on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Cassia fistula (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.