BHMS 1st year · Homoeopathic Pharmacy
Drug Proving — the first-year Pharmacy chapter on how a medicine is first known
A study guide to Drug Proving in first-year Pharmacy: pharmacodynamics, Organon aphorisms 105 to 145, later provings, the HPT and its protocols.
Vaibhav Kumar Rai · · 3 min read

How does homoeopathy learn what a medicine does? Not by guessing from its look. The answer is a method called drug proving. Healthy volunteers take a substance under set conditions, and the changes they notice are carefully recorded.
The NCH syllabus gives Drug Proving chapter twenty-two of first-year Homoeopathic Pharmacy (HomUG-HP). It is one of the fuller chapters of the year, with six topics. This piece walks through each one in plain words.
A reminder: this is a study guide for BHMS students. Proving is done by trained people under proper rules. It is never something to try on your own.
Topic one: homoeopathic pharmacodynamics
The first topic reads “Homoeopathic Pharmacodynamics”.
Pharmacodynamics means the study of what a drug does to the body. “Homoeopathic” tells you to study it the homoeopathic way. In homoeopathy, that knowledge comes mainly from proving. So this topic sets up the rest of the chapter.
Topic two: the Organon aphorisms
The second topic reads “With reference to aphorisms 105–145 of Organon of Medicine (6th Ed)”.
The Organon of Medicine is Hahnemann’s founding book, written in numbered paragraphs called aphorisms. Aphorisms 105 to 145 deal with proving. That is forty-one paragraphs.
Here is a useful fact. The first-year Organon syllabus lists the same range, “§ 105 to 145”, in its third chapter. So you meet these aphorisms in two subjects in the same year. Study them once, well, and use your notes in both. A table helps: aphorism number, main point in your own words, and a key phrase.
Topic three: after Hahnemann
The third topic reads “Post Hahnemannian Drug Proving”.
Proving did not stop with Hahnemann. Others carried it on, and the method changed. This topic asks what changed and why. The sheet does not list the changes. Your textbook does. A two-column note works: Hahnemann’s method on one side, later practice on the other.
Topic four: the Homoeopathic Pathogenetic Trial
The fourth topic reads “Homoeopathic Pathogenetic Trial (HPT)”.
HPT is the more formal, modern name for a proving. “Pathogenetic” refers to the changes a substance can produce in a healthy person. “Trial” tells you it is a planned study. Learn the full name and the short form. Examiners use both.
Topic five: the protocols
The fifth topic reads “CCRH & Other Protocols on HPT”.
A protocol is a written plan that sets out how a study must be done. CCRH is a research body for homoeopathy in India, and the sheet names its protocol along with others. Your textbook will give the steps. Learn the CCRH protocol well, then note how the others differ.
Topic six: other provers
The sixth topic reads “Other Noted Provers & their work on Drug Proving”.
The sheet does not name them, so this piece will not either. Your textbook will. For each prover, write who they were and what their work added. Keep each note to a few lines.
How it sits in the year
Drug Proving comes right after “Doctrine of Signature”. The order is worth noticing. First you study an old way of guessing a medicine’s use from its appearance. Then you study the method homoeopathy uses instead.
Proving also appears earlier and later in first year. Chapter two, “Homoeopathic Pharmacy Basics”, lists the “Doctrine of Drug Proving & Drug Dynamisation”. Chapter thirty-two, “Homoeopathic Pharmacy – Relationships”, covers the “Role of Drug Proving & Other Types of Proving in construction of Materia Medica”. That last link matters. The medicines you read about in Materia Medica are described largely from provings.
What to take from it
- Know what pharmacodynamics means, and why proving is its basis in homoeopathy.
- Learn aphorisms 105 to 145, and share the notes with your Organon study.
- Know how proving changed after Hahnemann.
- Know what an HPT is, and the CCRH protocol in steps.
- Know the noted provers your textbook lists.
The sheet names six topics without detail. This piece explains what each asks and where it connects. The content comes from your textbook and teachers.
Where to go next on the platform
This piece is in the first-year Homoeopathic Pharmacy room. In the first-year Organon room, “Vital force, dynamization, cure and drug proving — a first-year Organon chapter” covers proving from the Organon side. “Materia Medica in the First Year — fifty medicines and a method” shows where proving’s findings end up.
Written by Vaibhav Kumar Rai · Published by Homoeopaths.org · 16 October 2026
"Drug Proving — the first-year Pharmacy chapter on how a medicine is first known." Homoeopaths.org. Published 16 October 2026. https://homoeopaths.org/learn/courses/bhms-1st-year/homoeopathic-pharmacy/drug-proving-1st-year
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