BACKGROUND: Homeopathic repertories are essential tools in remedy diagnosis, helping practitioners match patient symptoms with those produced by remedies. However, repertories often need to be revised due to omissions, misinterpretations, and incomplete representation of remedy symptoms. Despite their importance, the sensitivity of repertories - their ability to correctly identify remedies based on corresponding rubrics - has never been systematically estimated. Addressing this gap is crucial to ensuring repertories' accuracy, reliability and validity in homeopathic practice. METHODS: We adopted the sensitivity formula used in medical diagnostics, where true positives indicate correct remedy identification and false negatives represent failures. This method was applied to Kent's repertory for RESULTS: Of the 525 symptoms of CONCLUSION: The sensitivity of Kent's repertory for