How does Coffee Senna work as a laxative?

Coffee Senna works through anthraquinone glycosides, known as sennosides. Gut bacteria metabolize these into rhein anthrones, which stimulate colonic peristalsis and inhibit water and electrolyte absorption. This action increases stool volume and moisture. Evidence Level A supports this mechanism for treating constipation, typically inducing effects within 6 to 12 hours after ingestion.

Is Coffee Senna safe to take during pregnancy?

No, Coffee Senna is unsafe during pregnancy. The anthraquinone content stimulates uterine contractions, creating a risk of miscarriage or premature labor. Furthermore, the strong laxative action can lead to dehydration and electrolyte imbalances harmful to the fetus. Health authorities contraindicate the use of stimulant laxatives like Senna species during pregnancy (Evidence Level A).

What is the recommended dosage for Coffee Senna?

The standard adult dosage for Coffee Senna leaves is 2–3 grams prepared as a tea to relieve constipation. Roasted seeds are used as a coffee substitute but must be prepared correctly to reduce toxicity. Use should be limited to short periods (under 10 days) to avoid dependency and electrolyte disturbance (Evidence Level A/Traditional).

Does Coffee Senna interact with prescription medications?

Yes, Coffee Senna has significant drug interactions. Its laxative effects can cause hypokalemia (low potassium), which increases the toxicity of cardiac glycosides like digoxin. It also interacts with diuretics, exacerbating electrolyte loss, and antiarrhythmic medications. Patients taking these drugs should avoid this herb to prevent serious cardiac complications (Evidence Level A/D).

Are Coffee Senna seeds toxic to the liver?

Yes, Coffee Senna seeds can be toxic to the liver. They contain chrysarobin, a compound associated with hepatotoxicity, particularly when consumed raw or in excess. While roasting reduces some toxicity, overconsumption of the 'coffee' preparation poses risks. Children are highly susceptible to seed toxicity, which has caused fatal poisoning in livestock and humans (Evidence Level B/Traditional).

Coffee Senna (Senna occidentalis)

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 30 PubMed articles · model: gemma4:31b

Summary

Senna occidentalis (Coffee Senna) is a pantropical leguminous herb used in traditional medicine for various conditions, though it exhibits significant toxicity, particularly in its seeds [PMID:34560215, PMID:35046973, PMID:14676015].

Background

Senna occidentalis (L.) Link, also known as Coffee Senna or Cassia occidentalis, is an annual leguminous herb found in Africa, Asia, and the Americas [PMID:34560215, PMID:35046973, PMID:41550785].

Traditional uses

It is used in Ayurvedic medicine in India and other traditional systems to treat diabetes, haematuria, rheumatism, typhoid, asthma, hepatotoxicity, disorders of haemoglobin, leprosy [PMID:34560215], snakebite [PMID:36879244], malaria (specifically root decoctions in Kenya) [PMID:36879244], and as a laxative, analgesic, febrifuge, diuretic, vermifuge, and colagogo [PMID:21571057, PMID:31616727]. It is also used in Brazil as an anthelmintic agent [PMID:37044282] and in India for treating fractures and bone diseases [PMID:30703497].

Active compounds

The plant is rich in anthraquinones [PMID:35046973]. Specifically, dianthrone is identified as the main toxic component [PMID:26894038]. Fruit essential oils contain cyperene (10.8%), β-caryophyllene (10.4%), limonene (8.0%), and caryophyllene oxide (6.8%) [PMID:29347835]. Other identified phytochemicals include Apigenin and Aloe-emodin [PMID:41550785].

Mechanism of action

Dianthrone impairs mitochondrial oxidative phosphorylation, which leads to myofiber degeneration [PMID:26894038].

Clinical evidence

Evidence CDiabetes

Pharmacological evidence suggests potential to control or compensate for diabetes and associated complications [PMID:34560215]. Ethanolic root extracts showed hypoglycemic effects in normal rats with induced hyperglycemia [PMID:33014467].

Evidence DMalaria

Root extracts demonstrated antiplasmodial activity in vitro against Plasmodium falciparum and in vivo in Plasmodium berghei-infected mice [PMID:36879244, PMID:37583959].

Evidence DWound Healing and Inflammation

Methanol leaf extracts showed 95.04% wound healing and 62.94% anti-inflammatory activity in experimental tests [PMID:41550785].

Evidence DBone Loss/Fracture

Ethanolic extracts of leaf and stem demonstrated efficacy in fracture healing and preventing glucocorticoid-induced osteoporosis in rat models [PMID:30703497].

Evidence DSARS-CoV-2

An herbal combination (PHELA) containing S. occidentalis inhibited >90% of SARS-CoV-2 and SARS-CoV infection in vitro [PMID:35718800].

Safety & adverse effects

The plant is potentially toxic to humans and animals, with seeds being the most poisonous part [PMID:14676015, PMID:26894038]. In humans, ingestion can lead to hepatoencephalopathic syndrome and acute liver failure [PMID:31616727]. Animal studies show severe toxicity including skeletal and cardiac muscle necrosis [PMID:9262958, PMID:15721195, PMID:34437876], hepatic encephalopathy with acute hepatocellular swelling and coagulative necrosis [PMID:34437876], and subacute hepatotoxicity characterized by elevated ALT and AST enzymes and microvesicular steatosis [PMID:32908500]. Chronic administration in rats affected hematopoietic organs [PMID:26435339]. However, hydroalcoholic extracts of stem and leaf showed no hazardous symptoms or death in acute toxicity tests in rats (LD50 > 5 g/kg) [PMID:21571057].

Evidence summary

Evidence is primarily based on in vitro studies, animal models (rats, mice, sheep, pigs, cattle, and chickens), and a single human case report. There are no human clinical trials (RCTs) or systematic reviews provided to establish clinical efficacy or safety in humans.

PubMed sources

1.PMID: 34560215 (2022) — Ethnobotanical, phytochemical, toxicology and anti-diabetic potential of Senna occidentalis (L.) link; A review. · Journal of ethnopharmacology
2.PMID: 9262958 (1997) — Mitochondrial myopathy in Senna occidentalis-seed-fed chicken. · Ecotoxicology and environmental safety
3.PMID: 26894038 (2016) — Cardiotoxicity of Senna occidentalis in sheep (Ovis aries). · Open veterinary journal
4.PMID: 36879244 (2023) — Senna occidentalis (L.) Link root extract inhibits Plasmodium growth in vitro and in mice. · BMC complementary medicine and therapies
5.PMID: 35046973 (2021) — De novo Transcriptome Assembly of Senna occidentalis Sheds Light on the Anthraquinone Biosynthesis Pathway.

Coffee Senna

Sources & Citations

Blue Flag

Coprosma Robusta

Cassia sieberiana

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Safety & adverse effects

Evidence summary

PubMed sources

Government sources

Coffee Senna

Sources & Citations

Related Herbs

Blue Flag

Coprosma Robusta

Cassia sieberiana

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Safety & adverse effects

Evidence summary

PubMed sources

Government sources