Pelargonium

Umckaloabo; Stevens’ Consumption Cure; Pelargonium sidoides DC. and Pelargonium reniforme Curt.; in pharmacy Pelargonii radix, pelargonium root

Known today as
The root of two South African pelargoniums of the family Geraniaceae, Pelargonium sidoides and Pelargonium reniforme, relatives of the ornamental pelargoniums popular in Europe. The European Pharmacopoeia defines the drug as “the dried, usually fragmented underground organs” of the two species.
Kind
Plant, in 2 older authorities
Constituents
proanthocyanidins, umckalin, glucogallin, and 1 more
Earliest authority here
The European Medicines Agency’s assessment report (2024), after Helmstädter
In other databases
Plants of the World Online · GBIF · Wikidata

Caution. The European agency does not recommend it for children under three, and under six only in liquid forms. Cases of hepatotoxicity and hepatitis have been reported with its use, and the agency advises stopping at once and consulting a doctor if signs of liver injury appear. Nose and gum bleeding, rash, itching, gut upsets, and hypersensitivity reactions including anaphylaxis have also been reported.

Pelargonium: what was it used for?

A root for the chest. In southern Africa, by the account of the European Medicines Agency’s assessment report, infusions of the roots of both species were used for coughs, chest problems including tuberculosis, and disorders of the gut such as diarrhoea and dysentery, and were claimed to cure disorders of the liver and painful menstruation, while the aerial parts served to heal wounds.

Pelargonium: what does modern science say?

The European Medicines Agency’s herbal committee accepts the root as a traditional herbal medicine, “exclusively based upon long-standing use,” for the symptomatic treatment of the common cold (monograph of 2024). Its assessment report finds the roots rich in oligomeric and polymeric proanthocyanidins, with simple coumarins characteristic of the genus, and names glucogallin, catechin, and umckalin among the major constituents of an aqueous root extract. A Cochrane review of 2013 found that a liquid preparation relieved most outcomes of acute bronchitis in adults (three trials, 746 patients) but tablets did not, with similar results in children (three trials, 819); it judged that the extract may relieve the symptoms of acute rhinosinusitis and the common cold in adults, “but doubt exists,” and rated the evidence low for bronchitis and very low for sinusitis and the common cold. Adverse events were more common with the extract, but none were serious.

Pharmacognosy & Toxicology

Constituents
Mechanism
Not established in the sources read for this entry.
Standing
European Union herbal monograph (2024): traditional use, “exclusively based upon long-standing use,” for the common cold. A Cochrane review (2013) rated the evidence low to very low.
  • European Medicines Agency, Committee on Herbal Medicinal Products. European Union herbal monograph on Pelargonii radix (Pelargonium root). EMA/HMPC/648100/2022, 29 May 2024. Read in full · the text read
  • European Medicines Agency, Committee on Herbal Medicinal Products. Assessment report on Pelargonii radix. EMA/HMPC/765656/2022, 29 May 2024. Read in part · the text read
  • Timmer A, et al. (2013). Pelargonium sidoides extract for treating acute respiratory tract infections. The Cochrane database of systematic reviews. PMID 24146345. Abstract read · the text read

The abstract of each source, beneath its citation. For Club members. About the Club or sign in.

Constituent names open the compound’s record at PubChem, and “ChEMBL” beside a name opens its record at ChEMBL, the European Bioinformatics Institute’s database of bioactive molecules. Where a mechanism line was checked against ChEMBL (ChEMBL 37, read 1 October 2026), the check is shown with the measured value and its source paper, or says plainly that nothing has been measured. Doses are as the references give them, for description only; this is not medical advice. Each source carries the result of its check against Crossref, PubMed, or the authority’s page: see Verification.

Pelargonium: what lore surrounds it?

The Association’s investigators found no such plant as umckaloabo in any work of reference, nor in Smith’s South African Materia Medica; sixty-eight years later chromatography put a name to it, and the name the Association called fancy is now the trade name of the extract, Umckaloabo (EPs 7630).

Pelargonium: what did the older authorities say?

The European Medicines Agency’s assessment report (2024), after Helmstädter
The Englishman Charles Henry Stevens went to South Africa in 1897 on his doctor’s advice to cure his tuberculosis, was treated there by a Zulu medicine man with a boiled root preparation, and three months later considered himself cured. Back in Britain he set up a company to sell the remedy as “Stevens’ Consumption Cure.” From 1920 the French-Swiss physician A. Sechehaye treated tuberculosis patients with it, documenting around 800 over nine years. The source of the root stayed unidentified until 1977, when Bladt and Wagner at the University of Munich showed that it came from Pelargonium sidoides and/or P. reniforme.
British Medical Association, Secret Remedies (1909)
The Association treated Stevens’ Consumption Cure as a quack medicine sold by a series of letters to sufferers. It quoted his circular to doctors announcing that the secret formula was now revealed as umckaloabo root and chijitse, and answered: “The farce of revealing a formula by the employment of such fancy names as these is one of the oldest dodges of the quack medicine man.” Enquiries in South Africa, including one by the Native Affairs Department of Cape Colony in the Transkeian territories, could find no one who knew the names: “The result of the inquiry was entirely negative.”

Sources

  • British Medical Association (1909). Secret Remedies: What They Cost and What They Contain, “Stevens’ Consumption Cure.” Internet Archive, secretremedieswh00brit. Read in part · the text read
  • European Medicines Agency, Committee on Herbal Medicinal Products. European Union herbal monograph on Pelargonii radix (Pelargonium root). EMA/HMPC/648100/2022, 29 May 2024. Read in full · the text read
  • European Medicines Agency, Committee on Herbal Medicinal Products. Assessment report on Pelargonii radix. EMA/HMPC/765656/2022, 29 May 2024. Read in part · the text read
  • Timmer A, et al. (2013). Pelargonium sidoides extract for treating acute respiratory tract infections. The Cochrane database of systematic reviews. PMID 24146345. Abstract read · the text read
  • Honchar O, et al. (2026). Pelargonium sidoides - from ethnopharmacology to evidence-based medicine: a systematic review. Phytomedicine : international journal of phytotherapy and phytopharmacology. PMID 41653615. Abstract read · the text read

Verification

Checked
October 1, 2026
Passes
  • Every sentence read against its sources, in the pass over the remaining 343 entries
  • The Standing line checked against the authority it names (EMA, WHO, FDA, CITES, Commission E)
  • Every dated or regulatory claim checked by category across the database
Sources
5 cited: 1 read in full, 2 read in part, 2 abstract read. 2 with the abstract on file.
Corrections
None were needed.

What was checked, how, and what was found is set out on the Verification page. A checked source is one whose record was found; it does not make the entry medical advice.

Club members can point at a technical term in this entry, such as a constituent, an action, or a word of Jung’s, to read its definition from the source. The Club.

Cite This Entry

Version 1 · first published October 16, 2026

Chicago

“Pelargonium.” In Materia Medica, edited by B. C. P. Statema. Version 1. The Thinking Press, 2026–. Last modified October 16, 2026. https://thethinkingpress.org/materia-medica/pelargonium.

MLA

“Pelargonium.” Materia Medica, edited by B. C. P. Statema, version 1, The Thinking Press, 16 Oct. 2026, thethinkingpress.org/materia-medica/pelargonium. Accessed 17 Oct. 2026.

APA

Pelargonium. (2026, October 16). In B. C. P. Statema (Ed.), Materia medica (Version 1). The Thinking Press. Retrieved October 17, 2026, from https://thethinkingpress.org/materia-medica/pelargonium

Download for Zotero, EndNote, or Mendeley: BibTeX · RIS

Club members keep entries on a shelf with private notes, print the plates as cards, and receive an entry by email each week. Create a free account before January 1, 2027 and all of it is yours for good. About the Club

See Also

Nearby in the alphabet

Penicillin mould (common in damp buildings, house dust, and spoiling food) · Pearls, prepared (Pearls ground to a fine powder) · Pennyroyal (Mentha pulegium) · Pawpaw (the one temperate tree of the custard-apple family) · Peony (the kind formerly grown for its medicinal root) · Passionflower · Peppermint · Passarino’s white powder (a man skilled in the spagyric (chemical) art (note XXXIX))

Historical description, not medical advice.