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feat(medications): clinical sign-off of the interaction lexicon — three terms narrowed - #2298

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feat(medications): clinical sign-off of the interaction lexicon — three terms narrowed#2298
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@BigSimmo BigSimmo commented Aug 22, 2026

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Summary

#1YPV51 exists because #318 was closed on 2026-08-18 claiming a Clinical Lead review that had
not happened. This is the review actually happening.

All 37 catalogue terms were expanded to their resolved drug lists and read alongside the text of
the interaction rows each term fires on
— which is the step that had never been taken, and the
step that decided every finding below. 34 confirmed correct as they stood; 3 narrowed.

Each of the three has the same shape as the loperamide over-match fixed in #2278: a class token
matching drugs the rows plainly do not mean.

1. antihistamines — a CRITICAL false alert

All four rows describe additive anticholinergic burden, not histamine blockade. One says so
outright:

MODERATE — Additive anticholinergic effects if given with TCAs, sedating antihistamines, or antipsychotics.

Yet the term also resolved to cetirizine, fexofenadine and loratadine, which carry essentially no
anticholinergic activity and which the catalogue labels H1 Antihistamine (2nd Gen). So:

  • benzatropine + loratadine → CRITICAL "Additive anticholinergic toxidrome … risk of toxic megacolon"
  • oxybutynin + cetirizine → CRITICAL "…leads to frank delirium and bowel impaction"

The three second-generation agents are denied. Cyclizine, promethazine, alimemazine and
diphenhydramine stay — all genuinely anticholinergic, and what the rows mean.

2. corticosteroids — topical steroids firing systemic warnings

Every row is a systemic effect: five are insulin resistance and raised BSL, one tendon rupture with
ciprofloxacin, one additive hypokalaemia. The four purely topical agents are denied — a steroid
cream does not massively increase insulin requirements.

Inhaled agents are deliberately KEPT, and that is the more interesting half of the decision: the
hypokalaemia row is about a formoterol inhaler and names high-dose corticosteroids, and high-dose
inhaled steroids do carry systemic effects. Beclometasone and mometasone are catalogued
Topical/Inhaled and are kept on the same reasoning; fludrocortisone is kept as a mineralocorticoid
that raises BSL and drives hypokalaemia.

3. oral-contraceptives — an alert that argued against the safe option

Almost every row is an enzyme inducer destroying the combined pill. Depot medroxyprogesterone is
the method a woman is switched to when she is on an inducer, so a blanket "your contraception
will fail, use alternatives" does not merely cry wolf.

The catalogue already held the nuance the term was flattening, in medroxyprogesterone's own row:

HIGH — Strong CYP3A4 inducers (Carbamazepine, Phenytoin) accelerate the clearance of the oral
tablets, but the massive 150mg IM depot is generally resistant to clinically failing from this.

That row still fires. Removing the generic alert is safe precisely because the accurate one was
already there
, and there is now a test pinning it — losing it would be the dangerous
over-correction.

This one was found by the test failing. The first assertion said carbamazepine + medroxyprogesterone
should now be silent; it wasn't, because of the row above. The test was wrong, not the change.

Two classification questions, answered

  • Moclobemide stays out of maois. Those rows concern irreversible inhibition — tyramine-driven
    hypertensive crisis, the washout interval — which a reversible inhibitor does not carry. Its
    serotonergic risk is covered separately.
  • Atomoxetine stays classified SNRI. It is a noradrenaline reuptake inhibitor and the rows that
    fire on it concern noradrenergic and serotonergic load.

A reversal, recorded as such

Yesterday's partial-progress record listed "splitting antihistamines by sedation" among four
proposals made and withdrawn. Today that withdrawal is reversed and the split applied.

It is worth being explicit that this is evidence-driven rather than a change of mind. The original
withdrawal reasoned only that the term selects the antihistamine subclass, so splitting it would mean
the term no longer meant "antihistamines" — reasoning that never examined what the rows say. Reading
them settled it. The other three withdrawals still stand, and the ledger record now distinguishes
the two cases so neither is re-litigated blindly.

A document that contradicted itself

build-medication-lexicon-report.ts hardcoded **Status: UNREVIEWED.** into the header while
separately preserving a human-recorded sign-off block at the bottom. The day anyone signed off, the
first sentence of the document would have said the opposite of its last section — and the header is
the half a reader actually sees.

The status line is now derived from the recorded sign-off, on the same read in both the write and
--check paths (a different derivation in each would make --check report a permanently stale
artefact). When signed it states the date and adds the caveat that matters: the sign-off covers the
mappings as they stood on that date only, and any later change must be re-checked.

What this sign-off does NOT fix — filed as its own row

acei resolves to perindopril alone, arbs to candesartan alone, statins to atorvastatin and
rosuvastatin. Ramipril, lisinopril, irbesartan and simvastatin are absent from the catalogue
entirely
— simvastatin notably, having the largest CYP3A4 profile of the statins.

A clinician entering a patient on ramipril sees no alert, and on screen that is indistinguishable
from "checked and clear"
. The terms are correct; the drugs are missing. The new row carries an
explicit stop: do not "fix" this by loosening the terms.

Honesty about the process

Recorded in the sign-off itself, because this row exists over a closure that over-claimed: an
assistant analysis proposed a verdict per term with its evidence, and the Repository Lead read and
accepted them. It is a reviewed-and-accepted sign-off, not an independent re-derivation from the
primary sources
, and must not be described as one.

RAG impact: none. No retrieval, ranking, selection, ordering, answer-generation, match_* RPC, eval
harness, or golden-fixture surface is touched. This changes which catalogue medications three
interaction terms resolve to; the alert text shown to a clinician remains verbatim from the
catalogue.

Verification

  • npx vitest run tests/medication-interactions.test.ts53 passed (53).
  • npm run check:medication-interactions — "data/medication-interaction-index.json is up to date (525 rows)."
  • npm run check:medication-lexicon-report — "docs/medication-interaction-lexicon-review.md is up to date (37 catalogue terms)."
  • npm run check:outstanding-issues — "in step with data/outstanding-issues-snapshot.json (78 open, 46 pending)".
  • npm run check:ledger-write-discipline — "Ledger write discipline passed for 936283a..HEAD."
  • npm run docs:check-links — "docs link check passed: 2225 repo path references resolve."
  • npm run verify:pr-local — see the summary block, not the exit code (below).

Measured, not asserted. Regenerating the index with and without the change:

Medications changed 23
Counterparties removed medroxyprogesterone ×10, betamethasone ×9, clobetasol ×9, hydrocortisone-1 ×9, triamcinolone ×9, cetirizine ×4, fexofenadine ×4, loratadine ×4
Added anywhere none — counterparty sets diffed in both directions
Medications in catalogue 328 → 328
resolved / unresolved rows 392 / 133 → 392 / 133

Mutation-tested, not merely run. Each change was reverted, the index regenerated, the tests
observed to fail, and the change restored:

Reverted Tests failing
antihistamines deny-list 3
corticosteroids deny-list 4
oral-contraceptives slug list 1
(restored) 0 — 53 passed

Both directions are asserted for every change: the false alert is gone and the true alert the
term exists for still fires — including the inhaled steroids on the formoterol row, and
medroxyprogesterone's own inducer row.

A gate that reports the wrong thing — still

npm run verify:pr-local printed failed: docs:check-links (exit 1) in its own summary block and
then exited 0, exactly as it did on #2286. The failure was real: two pending mutations targeted
#1YPV51 and the batch was refused. Read the summary block; $? is not trustworthy on this wrapper.

Clinical Governance Preflight

  • Source-backed claims still require linked source verification before clinical use
  • No patient-identifiable document workflow was introduced or expanded without explicit governance approval
  • Supabase target remains Clinical KB Database (sjrfecxgysukkwxsowpy)
  • Service-role keys and private document access remain server-only
  • Demo/synthetic content remains clearly separated from real clinical sources
  • Source metadata, review status, and outdated/unknown-source behavior remain conservative
  • Deployment classification/TGA SaMD impact was checked when clinical decision-support behavior changed

Notes

  • Every change removes an alert, which is the direction deserving scrutiny. In each case the
    justification is that the alert was never applicable — the catalogue's own classifications and, for
    medroxyprogesterone, the catalogue's own row text say so.
  • No migration, no schema change, no hosted mutation, no provider access.
  • docs/outstanding-issues.md is not edited here; every ledger mutation is a queued immutable
    request applied by a later npm run issues:reconcile.

Summary by CodeRabbit

  • Bug Fixes

    • Reduced false-positive medication interaction alerts for selected antihistamines, topical corticosteroids, and medroxyprogesterone.
    • Preserved alerts for clinically applicable systemic, inhaled, anticholinergic, and combined oral contraceptive interactions.
  • Documentation

    • Recorded the completed clinical review and updated outstanding issue records.
    • Documented missing catalogue coverage for common ACE inhibitors, ARBs, and statins.
  • Reporting

    • Medication lexicon reports now retain valid review sign-offs and display the recorded review date.

BigSimmo and others added 3 commits August 22, 2026 22:16
…ee terms narrowed

Ledger #1YPV51. All 37 catalogue terms were expanded to their resolved drug
lists and reviewed against the text of the rows each fires on. 34 confirmed;
3 narrowed, each the same shape as the loperamide over-match — a class token
matching drugs the interaction rows plainly do not mean.

antihistamines: every row is additive ANTICHOLINERGIC burden, and one says
"sedating antihistamines" in its own words. Cetirizine, fexofenadine and
loratadine resolved into it anyway, so benzatropine + loratadine produced a
CRITICAL "anticholinergic toxidrome ... risk of toxic megacolon" alert and
oxybutynin + cetirizine "frank delirium and bowel impaction". The three
second-generation agents are denied; cyclizine, promethazine, alimemazine and
diphenhydramine stay.

corticosteroids: every row is a systemic effect — insulin resistance x5, tendon
rupture with ciprofloxacin, additive hypokalaemia. The four purely topical
glucocorticoids are denied. Inhaled agents are deliberately KEPT: the
hypokalaemia row concerns a formoterol inhaler and names high-dose
corticosteroids, and fludrocortisone stays as a mineralocorticoid that raises
BSL and drives hypokalaemia.

oral-contraceptives: the rows are enzyme inducers destroying the COMBINED pill.
Depot medroxyprogesterone is the method a woman is switched TO on an inducer,
and its own catalogue row already carries the nuance the generic term flattened
— inducers "accelerate the clearance of the oral tablets, but the massive 150mg
IM depot is generally resistant to clinically failing from this." It is removed
from the term; its own row still fires. That row is what makes the removal safe,
and there is a test pinning it.

Also: the report generator hardcoded "**Status: UNREVIEWED.**", so the day a
clinician filled in the sign-off the document contradicted itself in its own
first sentence. The status line is now derived from the recorded sign-off, on
the same read in both the write and --check paths, and says explicitly that the
sign-off covers only the mappings as they stood on that date.

Measured: 23 medications changed, removals only, nothing added anywhere, all 328
medications intact, resolved/unresolved unchanged at 392/133. Each of the three
changes was mutation-tested — reverted, observed to fail 3/4/1 tests, restored.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
…al-signoff

# Conflicts:
#	data/outstanding-issues-snapshot.json
…ven reversal

Two pending mutations targeted #1YPV51 — yesterday's partial-progress update
from the loperamide fix, which explicitly instructed that the row not be closed
without owner confirmation, and today's closure now that the confirmation exists.

Both are cancelled with reasons and the closure is reissued carrying yesterday's
history, because requests are immutable and combining them means replacing
rather than editing.

The reason this matters beyond bookkeeping: yesterday's record listed "splitting
antihistamines by sedation" as a proposal made and WITHDRAWN. Today that
withdrawal was reversed and the split applied. The reversal is evidence-driven,
not a change of mind, and the closure says so: the original withdrawal reasoned
only that splitting would stop the term meaning "antihistamines" — it never
examined what the interaction rows say. They say "sedating antihistamines" and
describe an anticholinergic toxidrome, which the second-generation agents cannot
cause. The other three withdrawals from that day still stand, and the record now
distinguishes the two cases.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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📝 Walkthrough

Walkthrough

The change narrows medication interaction mappings, adds regression coverage, records a completed clinical review, preserves report sign-off data, and updates outstanding-issue records.

Changes

Medication lexicon updates

Layer / File(s) Summary
Interaction mappings and regression coverage
src/lib/medication-interaction-lexicon.ts, data/medication-interaction-index.json, tests/medication-interactions.test.ts
Selectors and counterparties exclude selected antihistamines, topical corticosteroids, and medroxyprogesterone. Tests verify removed false positives and retained interactions.
Clinical review and report preservation
docs/medication-interaction-lexicon-review.md, scripts/build-medication-lexicon-report.ts
The review document records dated sign-off, exclusions, coverage limits, and reviewed mappings. The report generator reads and preserves valid sign-off data.
Outstanding-issue state and closure records
data/outstanding-issues-snapshot.json, docs/outstanding-issues-inbox/*.json
The snapshot records five pending requests. Inbox records document the completed review and missing medication catalogue coverage.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: 🔵 Low · up to 77031

The PR narrows three medication mappings and updates the review report, but the report may still describe signed-off alerts as unvalidated, which could confuse clinical readers about the review status. This is a bounded documentation risk that should have explicit owner follow-up, while the PR remains mergeable.

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name Status Explanation Resolution
Description check ⚠️ Warning The description is detailed and relevant but omits the required Risk and rollout section, including risk, rollback, and provider or production effects. Add the Risk and rollout section with explicit risk, rollback, and provider or production effects statements.
Docstring Coverage ⚠️ Warning Docstring coverage is 33.33% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 3 files. (1 skipped: 1 unsupported.) Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (3 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly and concisely describes the clinical sign-off and narrowing of three medication interaction terms.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
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@BigSimmo
BigSimmo enabled auto-merge (squash) August 22, 2026 15:40
Resolve conflict in data/outstanding-issues-snapshot.json (generated file):
- Accepted origin/main version and regenerated with npm run snapshot:issues

Co-authored-by: BigSimmo <BigSimmo@users.noreply.github.com>

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Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents
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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
In `@docs/medication-interaction-lexicon-review.md`:
- Around line 196-202: Update the medication count in the “Recorded limits this
sign-off does NOT resolve” section from 20 to 26, keeping the surrounding
catalogue-coverage caveat unchanged.

In `@scripts/build-medication-lexicon-report.ts`:
- Around line 279-280: Update the report output construction around
beforeSignOff and recordedSignOff so the unreviewed disclaimer is included only
when recordedSignOff.date is empty; signed reports must use the rendered content
without that disclaimer before appending recordedSignOff.block.
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Comment thread docs/medication-interaction-lexicon-review.md Outdated
Comment thread scripts/build-medication-lexicon-report.ts
cursoragent and others added 4 commits August 22, 2026 16:27
…tion

Remove stale cancel/duplicate inbox requests that targeted requests already
applied on main (#2294). Update the done request baseRowFingerprint so
docs:check-links can replay the batch offline.

Co-authored-by: BigSimmo <BigSimmo@users.noreply.github.com>
…leanup

Co-authored-by: BigSimmo <BigSimmo@users.noreply.github.com>
Co-authored-by: BigSimmo <BigSimmo@users.noreply.github.com>
…d stop the signed report telling readers it is unreviewed

Two findings from review, both real.

The sign-off said the catalogue-coverage caveat applied to 20 medications; the
generated table above it says 26. The count rose *because of this review*, and a
bare number understated it — so the six are now named: betamethasone,
clobetasol, hydrocortisone 1%, triamcinolone, cetirizine and loratadine reach no
resolved interaction row at all. That is the intended result, since the alerts
they used to fire were the false ones removed here, but it has to be said out
loud: on screen "no applicable interaction" and "this drug reaches no row" look
identical, and a clinician checking clobetasol against insulin is now told
nothing where before they were told something wrong.

The trailing paragraph of the sign-off block still read "Until this is filled
in, treat every interaction alert as unvalidated" — directly beneath a completed
sign-off. Reworded to state what the sign-off covers and its date boundary.

Note on the second finding's diagnosis: it proposed suppressing the disclaimer in
the generator when a sign-off exists. The generator is already correct — it emits
that sentence *after* the `## Sign-off` heading, so `beforeSignOff(rendered)`
never carries it into a signed report. It survived only because the hand-written
sign-off block copied it verbatim, which is where it is fixed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
@BigSimmo
BigSimmo merged commit f3d1a3c into main Aug 22, 2026
58 checks passed
@BigSimmo
BigSimmo deleted the claude/lexicon-clinical-signoff branch August 22, 2026 17:01
cursor Bot pushed a commit that referenced this pull request Aug 22, 2026
Co-authored-by: BigSimmo <BigSimmo@users.noreply.github.com>
BigSimmo added a commit that referenced this pull request Aug 22, 2026
Review caught that #RSD9EJ's source field cited 7703188, a commit on the
#2298 feature branch. That branch is deleted and the PR was squash-merged, so
the commit resolves in no clone but the one that happened to fetch it — the row
was citing evidence nobody could inspect, which for a record whose whole value
is reproducibility makes it decorative.

Queued an update replacing it with the squash-merge commit f3d1a3c, which is
permanently on main, and with a reproduction that needs no commit references at
all: branch from main, let a reconcile land, merge main in, push. The guard
refuses; check-ledger-write-discipline --base origin/main passes on the same
tree. That divergence IS the bug, and anyone can produce it.

Applies at the next reconcile, since a request created on a reconcile branch
cannot be applied in the same transaction.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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