Proving Medicines

Organon Aphorism §134

All external influences, and more especially medicines, possess the property of producing in the health of the living organism a particular kind of alteration peculiar to themselves; but all the symptoms peculiar to a medicine do not appear in one person, nor all at once, nor in the same experiment, but some occur in one person chiefly at one time, others again during a second or third trial; in another person some other symptoms appear, but in such a manner that probably some of the phenomena are observed in the fourth, eighth or tenth person which had already appeared in the second, sixth or ninth person, and so forth; moreover, they may not recur at the same hour.

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.