Aphorism 121-130

§ 121
In proving medicines to ascertain their effects on the healthy body, it must be borne in mind that the strong, heroic substances, as they are termed, are liable even in small doses to produce changes in the health even of robust persons. Those of milder power must be given for these experiments in more considerable quantities; in order to observe the action of the very weakest, however, the subjects of experiment should be persons free from disease, and who are delicate, irritable and sensitive.

§ 122
In these experiments – on which depends the exactitude of the whole medical art, and the weal of all future generations of mankind – no other medicines should be employed except such as are perfectly well known, and of whose purity, genuineness and energy we are thoroughly assured.

§ 123
Each of these medicines must be taken in a perfectly simple, unadulterated form; the indigenous plants in the form of freshly expressed juice, mixed with a little alcohol to prevent it spoiling; exotic vegetable substances, however, in the form of powder, or tincture prepared with alcohol when they were in the fresh state and afterwards mingled with a certain proportion of water; salts and gums, however, should be dissolved in water just before being taken. If the plant can only be procured in its dry state, and if its powers are naturally weak, in that case there may be used for the experiment an infusion of it, made by cutting the herb into small pieces and pouring boiling water on it, so as to extract its medicinal parts; immediately after its preparation it must be swallowed while still warm, as all expressed vegetable juices and all aqueous infusions of herbs, without the addition of spirit, pass rapidly into fermentation and decomposition, whereby all their medicinal properties are lost.

§ 124
For these experiments every medicinal substance must be employed quite alone and perfectly pure, without the admixture of any foreign substance, and without taking anything else of a medicinal nature the same day, nor yet on the subsequent days, nor during all the time we wish to observe the effects of the medicine.

§ 125
During all the time the experiment lasts the diet must be strictly regulated; it should be as much as possible destitute of spices, of a purely nutritious and simple character, green vegetables,1 roots and all salads and herb soups (which, even when most carefully prepared, possess some disturbing medicinal qualities) should be avoided. The drinks are to be those usually partaken of, as little stimulating as possible.2

1 Young green peas, green French beans (‘boiled potatoes’ in the Sixth Edition) and in all cases carrots are allowable, as the least medicinal vegetables.

2 The subject of experiment must either be not in the habit of taking pure wine, brandy, coffee or tea, or he must have totally abstained for a considerable time previously from the use of these injurious beverages, some of which are stimulating, others medicinal.

§ 126 Fifth Edition
The person who is proving the medicine must during the whole time of the experiment avoid all over-exertion of mind and body, all sorts of dissipation and disturbing passions; he should have no urgent business to distract his attention; he must devote himself to careful self-observation and not be disturbed while so engaged; his body must be in what is for him a good state of health, and he must possess a sufficient amount of intelligence to be able to express and describe his sensations in accurate terms.

§ 126 Sixth Edition
The person who is proving the medicine must be pre-eminently trustworthy and conscientious and during the whole time of the experiment avoid all over-exertion of mind and body, all sorts of dissipation and disturbing passions; he should have no urgent business to distract his attention; he must devote himself to careful self-observation and not be disturbed while so engaged; his body must be in what is for him a good state of health, and he must possess a sufficient amount of intelligence to be able to express and describe his sensations in accurate terms.

§ 127
The medicines must be tested on both males and females, in order also to reveal the alterations of the health they produce in the sexual sphere.

§ 128 Fifth Edition
The most recent observations have shown that medicinal substances, when taken in their crude state by the experimenter for the purpose of testing their peculiar effects, do not exhibit nearly the full amount of the powers that lie hidden in them which they do when they are taken for the same object in high dilutions potentized by proper trituration and succussion, by which simple operations the powers which in their crude state lay hidden, and, as it were, dormant, are developed and roused into activity to an incredible extent. In this manner we now find it best to investigate the medicinal powers even of such substances as are deemed weak, and the plan we adopt is to give to the experimenter, on an empty stomach, daily from four to six very small globules of the thirtieth potentized dilution of such a substance, moistened with a little water, and let him continue this for several days.

§ 128 Sixth Edition
The most recent observations have shown that medicinal substances, when taken in their crude state by the experimenter for the purpose of testing their peculiar effects, do not exhibit nearly the full amount of the powers that lie hidden in them which they do when they are taken for the same object in high dilutions potentized by proper trituration and succussion, by which simple operations the powers which in their crude state lay hidden, and, as it were, dormant, are developed and roused into activity to an incredible extent. In this manner we now find it best to investigate the medicinal powers even of such substances as are deemed weak, and the plan we adopt is to give to the experimenter, on an empty stomach, daily from four to six very small globules of the thirtieth potency of such a substance, moistened with a little water or dissolved in more or less water and thoroughly mixed, and let him continue this for several days.

§ 129
If the effects that result from such a dose are but slight, a few more globules may be taken daily, until they become more distinct and stronger and the alterations of the health more conspicuous; for all persons are not effected by a medicine in an equally great degree; on the contrary, there is a vast variety in this respect, so that sometimes an apparently weak individual may by scarcely at all affected by moderate doses of a medicine known to be of a powerful character, while he is strongly enough acted on by others of a much weaker kind. And, on the other hand, there are very robust persons who experience very considerable morbid symptoms from an apparently mild medicine, and only slighter symptoms from stronger drugs. Now, as this cannot be known beforehand, it is advisable to commence in every instance with a small dose of the drug and, where suitable and requisite, to increase the dose more and more from day to day.

§ 130
If, at the very commencement, the first dose administered shall have been sufficiently strong, this advantage is gained, that the experimenter learns the order of succession of the symptoms and can note down accurately the period at which each occurs, which is very useful in leading to a knowledge of the genius of the medicine, for then the order of the primary actions, as also that of the alternating actions, is observed in the most unambiguous manner. A very moderate dose, even, often suffices for the experiment, provided only the experimenter is endowed with sufficiently delicate sensitiveness, and is very attentive to his sensations. The duration of the action of a drug can only be ascertained by a comparison of several experiments.

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