Proving Medicines

Organon Aphorism §115

Among these symptoms, there occur in the case of some medicines not a few which are partially, or under certain conditions, directly opposite to other symptoms that have previously or subsequently appeared, but which are not therefore to be regarded as actual secondary action or the mere reaction of the vital force, but which only represent the alternating state of the various paroxysms of the primary action; they are termed alternating actions.

Samuel Hahnemann, Organon of Medicine, 6th edition (Boericke translation, public domain).

Expert explanation & clinical interpretation for this aphorism are coming soon.