The Guiding Symptoms of our Materia Medica

Constantine Hering, MD (1800–1880), German by birth and American by adoption, was the father of American homeopathy. Originally commissioned to write a book disproving Hahnemann, he instead became his staunchest scientific defender after personally proving Lachesis (the bushmaster snake venom) in 1828.

Hering founded the first homeopathic medical school in the world (the Hahnemann Medical College of Philadelphia), introduced Lachesis, Glonoine, and dozens of other remedies into the materia medica, and formulated Hering's Law of Cure — still a central concept of classical practice.

He corresponded with Hahnemann himself and was the link between the European founder and the American tradition that Kent would later systematize.

The Guiding Symptoms of our Materia Medica was published in ten volumes between 1879 and 1891, the final volumes appearing posthumously. It is the most comprehensive compilation of verified homeopathic symptoms ever produced by a single author.

Hering worked on the material for forty years. Every symptom was graded by reliability — italicized for verified clinical confirmations, plain text for provings, brackets for single reports. This is the grading system that later repertories inherited.

For any remedy Hering proved personally — Lachesis above all — his entry remains the authoritative source. For polychrests, the depth of verified symptoms is unmatched.