Botanical Overview
Elymus repens (family Poaceae), commonly known as Couch grass, Common couch grass, Quackgrass, or Twitch grass, is a perennial rhizomatous grass native to Europe, Asia, and introduced to North America. The rhizome and root are the parts commonly used medicinally.
Energetics
This plant has a cooling temperature and moistening moisture quality. Its taste is sweet and mucilaginous with a descending directionality. It has a relaxing tonicity and influences the body’s fluids.
Primary Actions
- Diuretic
- Demulcent
- Anti-inflammatory
- Lithotriptic
Indications
Western
- Urinary tract irritation
- Kidney stones
- Bladder infections
- Inflammation of urinary tract
- Skin inflammation
- Digestive complaints with irritation
Syndromes
- Urinary tract infections
- Urolithiasis (kidney/bladder stones)
- Cystitis
- Interstitial cystitis
- Skin inflammatory conditions
TCM
No data available.
Ayurveda
No data available.
Unani
No data available.
Constituents & Mechanisms
The rhizome contains mucilage, saponins, flavonoids, alkaloids, polysaccharides, and silica which contribute to its demulcent, anti-inflammatory, and lithotriptic properties.
Dosage & Preparations
- Infusion: 2-4 g of dried rhizome, 2-3 times daily
- Decoction of rhizome for urinary tract complaints
- Tincture 1:5, 40% ethanol, 2-5 mL taken 1-3 times daily
Safety & Contraindications
Generally considered safe when used appropriately. Use caution in cases of severe kidney disease. Avoid use during pregnancy due to limited safety data. Prolonged use as a diuretic may affect electrolyte balance. Possible interactions with other diuretics and lithium; monitoring advised.
Astrological Correspondences
No reliable information on planetary or elemental rulers is available for Elymus repens.
Selected References
- Plants for a Future (PFAF) Database – Elymus repens (2023)
- European Medicines Agency, HMPC Assessment Report on Elymus repens (2015)
- Weiner, M. B. Herbal Medicine: Biomolecular and Clinical Aspects. 2nd edition (2017)