Masterwort

Imperatoria ostruthium

HRB-0189Entry “MASTERWORT” in the 1850 textIn Culpeper’s 1652 first edition

Open in the Concordance

Old claims, quoted verbatim: not medical advice. A warning sits above the claims and never hides them; no warning does not mean safe, only that no source here has flagged the plant.

Substance of concernFuranocoumarins: the juice on skin burns in sunlight.EFSA: Peucenin, imperatorin, osthrutol and 2 moreEFSA’s list of substances, not a danger rating. Checked 26 October 2026.

Historical correspondence. Ruled by Mars, by Culpeper. A traditional astrological assignment, kept apart from the modern evidence; it is not a finding.

What it does, in Culpeper: PurgeCounter-poison

Culpeper’s claims about it: 15, under 15 headings

  1. Appetite (to restore)CLM-0022691850 index, pp. 240, 295

    Listed in the 1850 index; the herbal entry has no sentence naming this complaint. No quotation is recorded.

  2. for the decoction in wine being gargled in the mouth, draws down much water and phlegm, from the brain, purging and easing it of what oppresses it.
    QUO-000295Papers and the EMA’s verdict, in the Concordance
  3. CrampCLM-000633
    It is effectual also against the dropsy, cramps, and falling sickness;
    QUO-000512Papers and the EMA’s verdict, in the Concordance
  4. DropsyCLM-000687
    It is effectual also against the dropsy, cramps, and falling sickness;
    QUO-000512Papers and the EMA’s verdict, in the Concordance
  5. Falling SicknessCLM-0007331850 index
    It is effectual also against the dropsy, cramps, and falling sickness;
    QUO-000512Papers and the EMA’s verdict, in the Concordance
  6. FeversCLM-0023091850 index, p. 114

    Listed in the 1850 index; the herbal entry has no sentence naming this complaint. No quotation is recorded.

  7. GravelCLM-000818
    It also provokes urine, and helps to break the stone, and expel the gravel from the kidneys;
    QUO-000634Papers and the EMA’s verdict, in the Concordance
  8. LungsCLM-001270
    It is also used in a decoction with wine against all cold rheums, distillations upon the lungs, or shortness of breath, to be taken morning and evening.
    QUO-000876Papers and the EMA’s verdict, in the Concordance
  9. Poison (to expel)CLM-0014091850 index
    It is of a rare quality against all sorts of cold poison, to be taken as there is cause;
    QUO-000960Papers and the EMA’s verdict, in the Concordance
  10. PurgingCLM-001440
    for the decoction in wine being gargled in the mouth, draws down much water and phlegm, from the brain, purging and easing it of what oppresses it.
    QUO-000295Papers and the EMA’s verdict, in the Concordance
  11. It is also used in a decoction with wine against all cold rheums, distillations upon the lungs, or shortness of breath, to be taken morning and evening.
    QUO-000876Papers and the EMA’s verdict, in the Concordance
  12. StomachCLM-001617
    The root of Masterwort is hotter than pepper, and very available in cold griefs and diseases both of the stomach and body, dissolving very powerfully upwards and downwards.
    QUO-001064Papers and the EMA’s verdict, in the Concordance
  13. StoneCLM-001721
    It also provokes urine, and helps to break the stone, and expel the gravel from the kidneys;
    QUO-000634Papers and the EMA’s verdict, in the Concordance
  14. UlcersCLM-001972
    The juice hereof dropped, or tents dipped therein, and applied either to green wounds or filthy rotten ulcers, and those that come by envenomed weapons, doth soon cleanse and heal them.
    QUO-001245Papers and the EMA’s verdict, in the Concordance
  15. WoundsCLM-002210
    The juice hereof dropped, or tents dipped therein, and applied either to green wounds or filthy rotten ulcers, and those that come by envenomed weapons, doth soon cleanse and heal them.
    QUO-001245Papers and the EMA’s verdict, in the Concordance

Source

Nicholas Culpeper, The Complete Herbal, a new edition (London: Thomas Kelly, 1850). Project Gutenberg eBook #49513. SRC-CUL-1850

Quotations are verbatim from the 1850 text, line breaks joined. Modern research and the European regulator’s verdict on each claim are on the Concordance page, kept apart from this historical record.