Note 276 — ON THE THEORY AND ART OF PRESCRIBING.
Reading edition
It appears from what has been stated under Section I. B. with respect to Diuretics, that some medicines not only assist, but actually DIRECT the operation of the substances with which they may be associated, and that many remedies act in unison with those they are joined with; thus Nitre in conjunction with Squill is diuretic; in conjunction with Guaiacum, diaphoretic; for these reasons I hesitated whether I ought not to have added a fifth constituent, and restored the “Dirigens” of ancient authors; enough, however, has been said to enable the practitioner to appreciate the importance of such a law of medicinal combination.