Senna Leaf
A natural laxative used for the short-term relief of occasional constipation.
Also known as: Senna • Cassia angustifolia
Overview
Senna leaf is an herbal medicine derived from the leaves of the senna plant (Cassia angustifolia). It is an FDA-approved over-the-counter laxative used to treat constipation. The active compounds in senna, known as sennosides, work by stimulating the muscles of the colon and promoting bowel movements.
Key Benefits
Relieves Occasional Constipation
Senna is an effective natural laxative that can provide relief from occasional constipation within 6-12 hours.
Clears the Bowel Before Medical Procedures
Senna is also used to empty the bowels before procedures such as a colonoscopy.
Dosage & How to Take
The typical dose of senna is 15-30 mg of sennosides per day. It is best to start with the lowest effective dose and increase if necessary.
| Purpose | Dose | Notes |
|---|---|---|
| Occasional Constipation | 15-30 mg of sennosides/day | Should not be used for more than one week without medical advice. |
Best Time to Take
Senna is usually taken at bedtime to produce a bowel movement the next morning.
With or Without Food
Can be taken with or without food.
Forms & Bioavailability
| Form | Absorption | Best For | Notes |
|---|---|---|---|
| Standardized Senna Extract | High | Reliable and consistent dosage | Available in tablets, capsules, and liquids. |
| Senna Tea | Varies | A more traditional method of use | The strength of the tea can be difficult to control. |
Side Effects & Safety
Common
- Stomach cramps
- Diarrhea
- Nausea
Rare
- Electrolyte imbalances (with long-term use)
- Liver damage (with long-term use)
Contraindications
- Should not be used by individuals with intestinal obstruction, Crohn's disease, or ulcerative colitis.
- Not recommended for long-term use.
Interactions
Senna can lower potassium levels, which can increase the risk of digoxin toxicity.
Senna-induced diarrhea can increase the effects of warfarin and the risk of bleeding.
Concurrent use can increase the risk of potassium loss.
Scientific Research
A randomized, double-blind, placebo-controlled trial of senna in the management of chronic constipation in adults
Senna was found to be an effective and well-tolerated treatment for chronic constipation.
Food Sources
Products With Senna Leaf
2 products in our database contain this ingredient
Frequently Asked Questions
Medical Disclaimer
This content is for educational and informational purposes only and is not intended as medical advice. Always consult with a qualified healthcare professional before starting any supplement regimen, especially if you have pre-existing health conditions or are taking medications. The statements on this page have not been evaluated by the Food and Drug Administration.