Agropyron repens

Agropyron (Elymus) repens                                 Common name: Couch Grass

Family: Poaceae

Part Used: Rhizome, seeds & root.

Constituents: Triticin, mucilage, silicic acid, potassium, inositol, mannitol, glycosides

Actions: Diuretic, demulcent, anti-microbial

Medical uses: May be used in urinary infections such as cystitis, urethritis and prostatitis. As a broadly applicable and safe diuretic it can be used in most conditions where this action is needed. Its demulcent properties soothe irritation and inflammation. It is of value in the treatment of enlarged prostate glands. It can also be used for easing or removing kidneys stones. As a tonic diuretic, couch grass has been used in the treatment in rheumatism.


  • Considered a saponin-based diuretic through osmotic diuresis effect of mannitol and others sugars.

Pharmacy: Dried rhizome: 4-8g TID. Decoction: 1 tbsp/cup, simmer 5 min, 1-2 cups TID. Tincture: (1:1, 25%), 4-8ml TID.

Contraindications: None known.

Toxicity: None known.

Interactions: Theoretical hypokalemia with long term use with K+ depleting diuretics.

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