Proving Medicines

Organon Aphorism §131

If, however, in order to ascertain anything at all, the same medicine must be given to the same person to test for several successive days in ever increasing doses, we thereby learn, no doubt, the various morbid states this medicine is capable of producing in a general manner, but we do not ascertain their order of succession; and the subsequent dose often removes, curatively, some one or other of the symptoms caused by the previous dose, or develops in its stead an opposite state; such symptoms should be enclosed in brackets, to mark their ambiguity, until subsequent purer experiments show whether they are the reaction of the organism and secondary action or an alternating action of this medicine.

Samuel Hahnemann, Organon of Medicine, 6th edition, translated by William Boericke (1922, public domain). Checked word for word against the 1922 printing in October 2026.

Study notes for this aphorism are not published yet. They appear here once a homeopath has reviewed them.