Botanical
Senna
Also known as: Senna alexandrina, Sennosides, Cassia angustifolia
Stimulant laxative for occasional constipation, works by stimulating intestinal contractions.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Primary uses
- Occasional constipation
- Bowel prep
- Short-term use
How it works
- Stimulates intestinal contractions
- Increases fluid secretion
- Works in 6-12 hours
- Not for regular use
Dosage
- Typical range
- 15-30mg sennosides or 1 cup tea at bedtime
- Timing
- Bedtime for morning effect
- With food
- Either way
- Duration
- Occasional use only (max 1-2 weeks)
- Special populations
- Occasional constipation
Forms
- Tea
- Tablets
- Liquid
Safety
Common side effects
- Cramping
- Diarrhea
- Electrolyte loss
Contraindications
- Chronic constipation (address cause)
- IBD
- Bowel obstruction
- Pregnancy
Evidence notes
Well-established stimulant laxative
Grade A: Multiple well-designed human trials support the main claims.
Related in Botanical
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.