Hoxsey formulas have varied with time and by clinic - "Brown tonic" of the 1950's:
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Each 5cc of the Hoxsey Tonic contains:
Barberry (Berberis vulgaris), 10 mg
Buckthorn bark (Rhamnus catharticus), 20 mg
Burdock root (Arctium lappa), 10 mg
Cascara (Cascara sagrada), 5 mg
Licorice (Glycyrrhiza glabra), 20 mg
Pokeroot (Phytolacca americana), 10 mg
Potassium iodide, 150 mg
Prickly ash bark (Zanthoxylum americanum), 5 mg
Red clover (Trifolium pratense), 20 mg
Stillingia root (Stillingia sylvatica), 10 mg
Maximum does: 1 teaspoonful 4 times per day.
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The Cancer Information and Support Society
http://www.ciss.org.au/documents/Hoxsey.html