Question 1

How does Cassia fistula work as a laxative?

Accepted Answer

Cassia fistula contains sennosides and anthraquinones, which act as stimulant laxatives. These compounds work by irritating the intestinal mucosa and stimulating colonic peristalsis, promoting bowel movements. The anthraquinones also increase fluid and electrolyte secretion into the intestinal lumen, softening stools. This mechanism is similar to senna. Effects typically occur 6-12 hours after ingestion. Evidence level: C (based on traditional use and pharmacological studies).

Question 2

Is Cassia fistula safe during pregnancy?

Accepted Answer

Cassia fistula is considered unsafe during pregnancy and should be avoided. The anthraquinone compounds can stimulate uterine contractions and may cause electrolyte imbalances harmful to both mother and fetus. Large amounts pose particular risk. Pregnant women experiencing constipation should consult a healthcare provider for safer alternatives such as dietary fiber supplements or osmotic laxatives. Evidence level: C.

Question 3

What is the recommended dosage of Cassia fistula for constipation?

Accepted Answer

The typical adult dosage for Cassia fistula as a mild laxative is the pulp from 1-2 pods, taken once daily. The pulp should be extracted from ripe pods and can be consumed directly or mixed with water. Do not exceed this dosage or use for extended periods (more than 7-10 days) without medical supervision. Evidence level: C (traditional use).

Question 4

Does Cassia fistula interact with any medications?

Accepted Answer

Cassia fistula may interact with several medications. Its laxative effects can reduce absorption of orally administered drugs by decreasing intestinal transit time. Chronic use may cause potassium depletion, potentially increasing toxicity of cardiac glycosides like digoxin and affecting antiarrhythmic medications. It may also potentiate effects of diuretics, worsening electrolyte imbalances. Avoid combining with other stimulant laxatives. Evidence level: C.

Question 5

What are the side effects of Cassia fistula?

Accepted Answer

Common side effects of Cassia fistula include mild gastrointestinal cramping, abdominal discomfort, and loose stools. These effects are dose-dependent and typically resolve after discontinuation. Chronic or excessive use may lead to electrolyte imbalances (particularly hypokalemia), dehydration, and dependency. Individuals with inflammatory bowel disease should avoid use due to potential irritation of the intestinal lining. Evidence level: C.

Cassia fistula

Sources & Citations

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Safety & adverse effects

Evidence summary

PubMed sources

Government sources