International Journal of Homoeopathic Sciences

Background: Jahr’s concentric circles present a conceptual model explaining the qualitative differences between the actions of low and high potencies in homoeopathy. By correlating drug proving, symptom differentiation, susceptibility, and posology, this model reinforces Hahnemann’s emphasis on characteristic symptoms and provides practical guidance for rational potency selection in clinical practice.

Objectives: To elucidate Jahr’s concept of concentric circles and its relevance in explaining the qualitative differences in the action of low, medium, and high potencies, and to correlate this model with characteristic symptoms, drug proving, susceptibility, and clinical posology.

Methods: A narrative review of classical homoeopathic literature was undertaken, including the Organon of Medicine and authoritative texts by Stuart Close and Roberts with interpretative analysis of Jahr’s geometric model.

Results: Jahr’s concentric circles demonstrate that as potencies rise, remedies exhibit increasing differentiation and clearer expression of characteristic symptoms, thereby enhancing accuracy in individualised prescribing and rational potency selection.

Conclusion: Jahr’s concentric circles provide a coherent conceptual framework linking drug proving, characteristic symptoms, susceptibility, and posology, reinforcing the importance of potency selection alongside remedy selection in homoeopathic practice.