Homeopathy and the Placebo Effect View PDF

^*Mihael Drofenik
Medicine, Jožef Stefan Institute, Materials Synthesis, Ljubljana, Slovenia

^*Corresponding Author:

Mihael Drofenik
Medicine, Jožef Stefan Institute, Materials Synthesis, Ljubljana, Slovenia

Published on: 2026-03-27

Abstract

Although homeopathy has a long historical tradition, its apparent therapeutic effects began to be interpreted differently after Hahnemann introduced the process of succussion into remedy preparation. Since then, it has often been assumed that the clinical effects reported with highly diluted preparations-where the probability of retaining molecules of the original substance is extremely low-must arise from placebo responses rather than pharmacological activity. This view is based on the assumption that succussion produces solutions devoid of active constituents, thereby rendering any therapeutic benefit attributable to patient expectations. However, this interpretation neglects the physicochemical consequences of mechanical processing. Systematic, blinded testing of symptom development in healthy volunteers (“provings”) using multiple potencies, in comparison with mechanically untreated water, may provide a more precise understanding of the relationship between placebo processes and homeopathic practice.

Keywords

Homeopathy, Hahnemann’s methodology

Introduction

According to the foundational doctrine of homeopathy, any pharmacologically active substance produces a characteristic pattern of symptoms when administered to healthy individuals. Disease, likewise, presents with a specific configuration of symptoms. Homeopathy proposes that a disease can be treated by administering a highly diluted preparation of a substance that, in its crude form, produces a similar symptom profile-summarized in the principle similia similibus curentur (“like cures like”) [1].

Hahnemann’s methodology contrasted sharply with that of contemporary allopathic medicine. Conventional pharmacology identifies diseases through symptoms and selects agents intended to counteract them. In contrast, homeopaths conducted systematic provings in healthy volunteers to catalogue symptom profiles which were then matched to patient presentations. This practice elevated the historically noted “Law of Similars,” attributed to Hippocrates, into the central organizing principle of homeopathic therapy.

Over the last two centuries, numerous hypotheses have attempted to explain the mechanism underlying homeopathic action, including the vital force [1], hormesis [2], water memory [3], informational models [4], psychological or placebo-based explanations [5], and quantum entanglement [6]. None has yet achieved broad empirical validation within the framework of contemporary biomedical science.

A more recent line of theorizing suggests that the therapeutic effect depends on the presence of a compound capable of producing similar symptoms in both healthy and diseased individuals-the simillimum [7, 8]. This idea has been explored through models of homeostatic regulation [9, 10] and through analogies to Le Châtelier’s principle [11]. In the latter formulation, disease is interpreted as a dynamic disequilibrium between health-supporting and pathologypromoting molecular processes. A homeopathic remedy is proposed to shift this equilibrium, causing a transient worsening (“homeopathic aggravation”) followed by improvement [12, 13].

To address aggravation and increase therapeutic efficacy, Hahnemann introduced serial dilution combined with vigorous mechanical processing (succussion). The theory asserts that this procedure “potentizes” a remedy-even at dilutions exceeding Avogadro’s number-despite the presumed absence of intact molecules of the starting material.