Natural Herb Library

Uniflower Swisscentaury Root

Chinese
漏芦
Pinyin
Lou Lu
Latin
Radix Rhapontici
Botanical illustration of Uniflower Swisscentaury Root, Rhaponticum uniflorum, showing medicinal roots, dried root segments, and diagnostic plant details.
Botanical plate by Kodi .

Known in TCM as Lou Lu (漏芦), this bitter, cold herb enters the Stomach. Traditionally, it clears heat and resolves toxin ... older Lou Lu records use the root for breast abscess, scrofulous swelling, and toxic sores with hardness or pain, most often applied for mastitis, insufficient lactation, and breast abscess. Modern research has identified Phytoecdysteroids among its active constituents.

Part used: Root

Also Known As

Lou Lu Root Rhaponticum uniflorum root Rhapontici

Latin: Radix Rhapontici | Pinyin: Lou Lu | Chinese: 漏芦

TCM Properties

Taste
bitter
Temperature
cold
Channels
Stomach

Traditional Use

Primary Actions

  • Clears heat and resolves toxin ... older Lou Lu records use the root for breast abscess, scrofulous swelling, and toxic sores with hardness or pain.
  • Promotes lactation and unblocks the breasts ... it is chosen when painful distention, swelling, or blocked flow prevents normal milk movement.
  • Relaxes the sinews and opens the channels ... traditional use also includes wind-damp pain, muscular tightness, and contracture.

Secondary Actions

  • This page intentionally preserves the older `Radix Rhapontici` Lou Lu lane and should not be collapsed into the already-live Echinops-based `globethistle-root` record.
  • The overlap in name is historically real, but plant identity and sourcing matter because the modern pharmacopoeial Yu Zhou Lou Lu lane is not the same root.

Classic Formulas

  • Lou Lu with Wang Bu Liu Xing and Tong Cao ... a classic blocked-lactation and painful breast-distention strategy.
  • Lou Lu with Jin Yin Hua and Lian Qiao ... heat-toxin and swelling logic for breast abscess or scrofulous nodules.
  • Lou Lu with Fang Feng or Qin Jiao ... channel-opening use for painful obstruction and stiffness.

Classical References

  • Traditional summaries describe older Lou Lu as bitter and cold, entering the Stomach to clear heat, reduce swelling, promote lactation, and relax the channels.
  • Import and trade confusion around Lou Lu is longstanding, which is why this Rhaponticum record should remain explicitly distinct from the Echinops source now used in modern pharmacopoeial practice.

Modern Research

Active Compounds

  • Phytoecdysteroids and related terpenoid constituents highlighted in Rhaponticum reviews
  • Flavonoids, sesquiterpenes, and phenolic fractions reported from Rhaponticum uniflorum
  • Multi-component anti-inflammatory extracts studied under the Rhapontici Radix label

Studied Effects

  • A 2022 comprehensive review summarized ethnopharmacological uses, metabolite diversity, and bioactivity of Rhaponticum uniflorum and is the clearest modern overview for the older Lou Lu lane (PMID 36421734).
  • A 2024 study reported anti-inflammatory effects of Rhapontici Radix extract on mastitis in vivo and in vitro, which maps unusually well to the herb's traditional breast-swelling use (PMID 38942158).
  • A 2022 study found that Rhaponticum uniflorum inflorescence extract ameliorated LPS-mediated acute lung injury through Nrf2/HO-1 signaling, supporting broader anti-inflammatory interest even outside the classic lactation lane (PMID 35738472).

PubMed References

Safety & Interactions

Contraindications

  • Pregnancy
  • Qi deficiency or weak digestion without heat, toxin, or blocked lactation
  • Flat non-inflamed ulcers without clear toxic swelling

Cautions

  • Correct sourcing matters because older Rhaponticum Lou Lu and modern Echinops Lou Lu are not interchangeable simply because the pinyin is shared.
  • Most modern evidence remains preclinical and should not replace evaluation of mastitis, breast abscess, or lactation failure.

Conditions

Frequently Asked Questions

What is Uniflower Swisscentaury Root used for?

Uniflower Swisscentaury Root is traditionally used to Clears heat and resolves toxin ... older Lou Lu records use the root for breast abscess, scrofulous swelling, and toxic sores with hardness or pain., Promotes lactation and unblocks the breasts ... it is chosen when painful distention, swelling, or blocked flow prevents normal milk movement., Relaxes the sinews and opens the channels ... traditional use also includes wind-damp pain, muscular tightness, and contracture.. Research has investigated its effects on: A 2022 comprehensive review summarized ethnopharmacological uses, metabolite diversity, and bioactivity of Rhaponticum uniflorum and is the clearest modern overview for the older Lou Lu lane (PMID 36421734).; A 2024 study reported anti-inflammatory effects of Rhapontici Radix extract on mastitis in vivo and in vitro, which maps unusually well to the herb's traditional breast-swelling use (PMID 38942158)..

What are other names for Uniflower Swisscentaury Root?

Uniflower Swisscentaury Root is also known as Lou Lu Root, Rhaponticum uniflorum root, Rhapontici. In TCM: 漏芦 (Lou Lu); Radix Rhapontici.

Is Uniflower Swisscentaury Root safe during pregnancy?

Uniflower Swisscentaury Root is not recommended during pregnancy.

What are the contraindications for Uniflower Swisscentaury Root?

Uniflower Swisscentaury Root should not be used in: Pregnancy; Qi deficiency or weak digestion without heat, toxin, or blocked lactation; Flat non-inflamed ulcers without clear toxic swelling. Consult a qualified practitioner before use.