Poison Hemlock (Conium maculatum)
Conium maculatum
Western Herbalism
Western Herbalism

Poison Hemlock

Conium maculatum

Also known as Hemlock, Spotted Hemlock, Conium, Poison Parsley.

CoolingDryingTaste: BitterTaste: Pungent

Historically used in Eclectic medicine ( ) as standardized preparation but extremely hazardous due to narrow therapeutic window and high toxicity. No modern pharmacopoeial approval for internal use found primarily external or homeopathic in dilution today. All parts poisonous mistaken for edible umbelliferae.

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SedativeAntispasmodicAnalgesicAlterative

Indications what the tradition reached for it in

Safety

Recognised toxicity. This plant carries a toxicity flag in the record; it is for trained practitioners only.

Low dose botanical. Used in drop doses in the classical practice; not a plant to dose freely.

Pregnancy: Pregnancy Caution

Breastfeeding: lactation

The record lists 3 contraindications; open the plate in the library to read them in full.

Dosing as the sources wrote it

PreparationAs writtenMetric
Fluid extract/specific coniumFluid extract/specific conium 1/10-3 drops0-0.06 mL
ethereal extractethereal extract 1/8-1/2 grain8.1-32.4 mg
coniineconiine 1/30-1/6 grain2.16-10.8 mg
inspissated juice/leavesinspissated juice/leaves 1-3 grains 3-4x/day64.8-194 mg
leaf tealeaf tea 1g/100mL water1000-1000 mg
fruit powderfruit powder 1g max1000-1000 mg

Doses are reproduced from the sources for practitioners and are not a recommendation for any person.

From the sources

Clinical Notes. Historically used in Eclectic medicine ( ) as standardized preparation but extremely hazardous due to narrow therapeutic window and high toxicity. No modern pharmacopoeial approval for internal use found primarily external or homeopathic in dilution today. All parts poisonous mistaken for edible umbelliferae.

Therapy. External. Locally applied extract of conium, or the powdered drug, relieves the pain of cancerous growths and ulcers. Locke advised, Rx. English Extract of Conium, 2 drachms; Petrolatum, 6 ounces. Mix.

Therapy. The anodyne and antispasmodic soothing properties of the agent suggest its use in spasmodic affections and irregular muscular movenients ... movements attended by extreme activity of the motor nerves. In paralysis agitans , in chorea and in hysteria, in delirium tremens and acute mania it is thus advised.

Action and Toxicology. Conium does not affect the intellectual portion of the brain; and it acts but feebly on the spinal cord. It does, however, powerfully depress the peripheral motor endings, and in excessive amounts, the sensory terminals.

Drawn from King's American Dispensatory, 18th edition (Felter and Lloyd); Ellingwood's American Materia Medica, Therapeutics and Pharmacognosy; Felter's Eclectic Materia Medica, Pharmacology and Therapeutics, and the Bountiful Herbs editorial.

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