What is the single most common mistake when applying a repertory?

Selecting the remedy at the top of the repertorisation total. The total reflects how many weighted rubrics a remedy appears in, not how well it fits the patient, and it is easily inflated by common rubrics. Reading across the analysis for coverage of the peculiar symptoms is more informative than reading down the ranked list.

Should a rubric be removed if it excludes the remedy I think is correct?

Only if there is a clinical reason — for example, the symptom it rests on has since been clarified as unreliable, or it described a reaction to a previous remedy rather than the patient's own picture. Removing a rubric because it narrows the field away from a preferred remedy is a form of confirmation reasoning and should be recorded and reviewed.

How do I handle a patient symptom that has no matching rubric?

Leave it unrubricised and carry it as a clinical observation alongside the analysis. Forcing a near-synonym into the repertorisation introduces a symptom the patient did not report. Before concluding a symptom is absent, search the index and the synonyms, since placement varies between repertories and editions.

Why does my repertorisation produce a different remedy each time I run it?

Usually because the rubric set is changing between runs, or because grading is inconsistent. Common causes are adding rubrics before the case is complete, regrading symptoms without recording why, and mixing follow-up reaction rubrics with the original constitutional picture. Fixing the rubric set and the grades before re-running removes most of the variation.

Repertory Application Pitfalls: A Troubleshooting Checklist

Why Case-Taking Errors Surface Later as Repertory Errors

Most repertory problems are not repertory problems. They are case-taking problems that only become visible when the case is translated into rubrics. A symptom recorded vaguely — "worse from weather" — cannot be rubricised without the prescriber guessing, and the guess is then carried forward as though it were a fact. The repertory faithfully returns remedies for a symptom the patient never described.

This is why troubleshooting usually has to move backwards before it moves forwards. When a repertory analysis produces a scattered, unconvincing remedy picture, the first diagnostic question is not "which rubric is wrong?" but "which of these rubrics rests on a symptom I actually clarified?"

The checklist below is organised around that backward-then-forward movement. Each item names a pitfall, explains the mechanism by which it distorts the analysis, and gives a concrete check. It is written for practitioners who already use a repertory routinely and want a fault-finding routine rather than an introduction.

Pitfall 1: Rubrics That Do Not Match the Patient's Own Words

Repertory language is nineteenth-century and idiomatic. "Ailments from mortification" and "delusions, thought she is pursued by enemies" are not phrases most patients use, and the temptation is to reach for the nearest modern-sounding rubric and treat the match as close enough. It rarely is: rubric placement inside the hierarchy encodes meaning, and a near-synonym can sit in a different section with a different clinical implication.

The check is mechanical and worth doing every time. Before a rubric goes into the analysis, read the patient's recorded phrase aloud next to the rubric text. If you cannot state in one sentence why the two are the same thing, the rubric is a placeholder, not a finding.

Where the patient's language genuinely has no rubric, the honest options are to leave the symptom unrubricised and carry it as a clinical observation, or to record it under the closest heading with a note that the fit is approximate. Silently absorbing the mismatch is the error.

Read the patient's exact wording beside the rubric text before adding it.
Check which section and sub-section the rubric sits in, not just its wording.
If the fit needs a sentence of justification, mark it as approximate rather than certain.
Leave symptoms unrubricised when no rubric genuinely corresponds; carry them separately.
Re-check any rubric you added early in the case, before the picture was clear.

Pitfall 2: Grading Everything as Intense

Intensity grading is meant to discriminate, and it stops discriminating the moment most rubrics are marked high. A common failure pattern is a case in which fifteen rubrics are graded 3 and the repertorisation is therefore driven by which remedy happens to appear in the largest number of them, not by the patient's most characteristic features.

The mechanism is straightforward: grading inflates the weight of ordinary symptoms and dilutes the weight of the strange, rare and peculiar ones that actually individualise the case. A patient's thirst, sleep position and thermal reaction are usually graded high because they are easy to observe, while the peculiar mental symptom that would narrow the field is graded low because it is hard to phrase.

A workable discipline is to reserve the top grade for a small number of symptoms and to be able to say why each one earned it. If you cannot articulate the reason a rubric is a 3 rather than a 2, it is a 2.

Pitfall 3: Treating Repertory Totals as a Ranking of Remedies

A repertorisation output is a count of rubric appearances weighted by grade. It is not a probability, a potency recommendation, or a statement about the patient in front of you. The most frequent error in application is reading the top of the list as the answer and working downward only when the first choice fails.

Two remedies can score identically while covering entirely different parts of the case. Conversely, a remedy that covers the single most characteristic symptom may sit well down the list because it is absent from the general rubrics that inflate everything else. The total is a shortlist generator, and its useful output is the shortlist, not the order within it.

Practically, this means reading across the columns of the repertorisation rather than down the total. Ask which remedies cover the peculiar symptoms, then check which of those also appear in the generals. Remedies that appear only in the generals are candidates for the generals, not for the case.

What the total shows	What it does not show	Useful response
How many weighted rubrics a remedy appears in	Whether those rubrics are characteristic of this patient	Check coverage of the peculiar symptoms separately
Relative breadth of a remedy's rubric presence	Whether the remedy fits the case as a whole	Re-read the materia medica for the top few
A ranked list of names	Anything about potency, repetition or prognosis	Treat the list as a shortlist only
That two remedies scored the same	That they are interchangeable	Compare which symptoms each one covers

Pitfall 4: Repertorising Before the Case Is Complete

There is a strong pull to begin repertorising during the first consultation, because the software is open and the rubrics are accumulating. The problem is that early rubrics are chosen before the practitioner knows which symptoms are characteristic, so they tend to be the common ones — and common rubrics are exactly the ones that add noise rather than signal.

A second, subtler version of this pitfall is repertorising a follow-up as though it were a new case. Rubrics taken from a reaction to the previous remedy describe the remedy's action, not the patient's constitutional picture, and mixing the two produces a distorted analysis that then justifies a change of remedy.

The check is procedural: finish the case narrative, mark which symptoms are peculiar and which are ordinary, and only then open the repertory. On follow-ups, keep rubrics that describe the original picture separate from rubrics that describe the current reaction.

An open reference book on a desk with handwritten notes and a pen resting across the page

Pitfall 5: Losing the Thread Between Rubric and Remedy

After a repertorisation, it is common to arrive at a remedy and then construct a justification for it, listing the rubrics it covers. This is confirmation reasoning, and it hides the fact that the remedy was selected on a total rather than on the case. The tell-tale sign is a case analysis in which the final remedy appears in most rubrics but in none of the symptoms the patient considered most distressing.

A related failure is dropping rubrics from the analysis because they exclude the remedy you have already chosen. Removing a rubric is sometimes correct — it may rest on a symptom you have since clarified as unreliable — but the reason must be clinical, not strategic.

The check is to write, in one or two sentences, why this remedy and not the two next closest. If the answer is a symptom count, the analysis is not finished. If the answer names specific symptoms and their modality or concomitant detail, it is.

State the reason for the chosen remedy without referring to the total.
Name the two next-closest remedies and the specific symptom that separates them.
Audit any rubric removed late in the analysis and record the clinical reason.
Confirm the remedy covers the symptoms the patient finds most limiting.
Check that no single rubric is carrying the whole decision on its own.

Pitfall 6: Ignoring the Structure and Edition of the Repertory in Use

Repertories differ in their internal architecture. Kent's arrangement, the additions and corrections carried in later editions, and the various modern compilations do not contain identical rubrics, and a rubric that exists in one may be absent or differently placed in another. Practitioners who move between sources without noticing will sometimes conclude that a symptom is unrepresented when it is merely in a different place.

Edition drift matters for a second reason: additions made by later editors carry their own provenance, and a rubric introduced from a single observation does not have the same weight as one built from a long tradition of provings and clinical confirmation. Treating all rubrics as equally established is a quiet source of error.

The practical response is to record which repertory and which edition produced each analysis, so that a later review can be reproduced. When a symptom appears unrepresented, search the index and the synonyms before concluding it is absent.

A stack of worn hardback reference books with visible page edges and faded spines

A Short Pre-Prescription Audit

The items above are easiest to apply as a fixed audit run immediately before the remedy is chosen, rather than as general principles to remember. Running the same sequence each time makes omissions visible, because a missing step stands out against the routine.

The audit is deliberately short. Its purpose is not to redo the analysis but to catch the specific failure modes that survive an otherwise careful case. If two or three items fail, the analysis needs revisiting rather than patching.

Recording the audit outcome alongside the case notes also creates a record that can be reviewed at follow-up, when it is otherwise difficult to reconstruct why a particular remedy was selected from a particular set of rubrics.

Every rubric traces to a symptom in the patient's own words or a clearly paraphrased equivalent.
The top grade is used sparingly and each instance can be justified.
Peculiar symptoms are represented in the analysis, not only generals.
The remedy choice can be explained without citing the repertory total.
Any rubric removed late has a recorded clinical reason.
The repertory and edition used are noted in the case record.
The remedy covers the symptoms the patient finds most limiting.