The anthranoid purgatives

Sennosides, aloin, rhein, emodin, and their kin, in senna, aloes, rhubarb, cascara, buckthorn, the purging cassia, yellow dock, madder, and the compound purges built on them (lenitive electuary, diacatholicon, hiera picra).

The anthranoid purgatives: how soon does it show?

Eight to twelve hours: the glycosides pass the small bowel and are freed by the colonic bacteria.

How does it run?

In a dose, a soft stool with some griping; in excess, watery diarrhoea with colic and loss of potassium, and with months of use the dark-stained colon (melanosis coli, harmless), dependence of the bowel, and low potassium that endangers the heart. The urine turns red or brown. Madder’s anthraquinone lucidin is genotoxic, and aloe-emodin and emodin were listed by the European Union in 2021 as not permitted in food supplements.

What is done for it?

Stopping; potassium; fluids.

Historical and descriptive, not medical advice. In a poisoning, call a poison centre or emergency services.

Which substances in the database cause it?

Sources

  • EMA/HMPC (2020). European Union herbal monograph on Senna alexandrina Mill., folium (EMA/HMPC/625849/2015). Read in full · the text read
  • European Commission (2021). Regulation (EU) 2021/468 on hydroxyanthracene derivatives in foods. Standard reference work
  • Westendorf, J., et al. (1998). “Carcinogenicity and DNA adduct formation observed in ACI rats after long-term treatment with madder root, Rubia tinctorum L.” Carcinogenesis 19. Verified against its record · doi:10.1093/carcin/19.12.2163