Root of the stinging nettle.
Quality is defined in the European Pharmacopoeia (Ph. Eur.).
HMPC monograph: Traditional-use: Urinary tract complaints in benign prostatic hyperplasia
ESCOP monograph: Micturition complaints in benign prostatic hyperplasia stage I and II (according to Alken) or stage II and III (according to Vahlensieck), painful and frequent urination, nocturnal urge to urinate, urinary retention.
Commission E-Commission: Micturition complaints in prostate adenoma stage I to II according to Alken