- Fixed. Medicines now show “what it is used for” from official label data when available, with curated/common-use text as the fallback.

Changed:
Added official_use, source name, and source URL fields to the medicine 
schema in [app/bootstrap.php (line 
200)](/Users/tyemeclifford/Documents/GH/workout/app/bootstrap.php:200).
Added shared display helpers and API used_for output in 
[app/bootstrap.php (line 
1848)](/Users/tyemeclifford/Documents/GH/workout/app/bootstrap.php:1848).
Updated openFDA imports to pull indications_and_usage first, then 
purpose, and store source links in [app/bootstrap.php (line 
3060)](/Users/tyemeclifford/Documents/GH/workout/app/bootstrap.php:3060).
Updated the medicine detail page to show “What It Is Used For” plus the 
openFDA label link in [public/medicine.php (line 
72)](/Users/tyemeclifford/Documents/GH/workout/public/medicine.php:72).
Updated catalog/list contexts to use the same helper, including 
[public/nutrition.php (line 
66)](/Users/tyemeclifford/Documents/GH/workout/public/nutrition.php:66).
Updated docs/counts in [README.md (line 
45)](/Users/tyemeclifford/Documents/GH/workout/README.md:45) and 
[CHANGELOG.md (line 
15)](/Users/tyemeclifford/Documents/GH/workout/CHANGELOG.md:15).
Database is updated to 7,646 medicines, with 200 openFDA label-derived 
use summaries, 8,077 medicine-condition links, and 10,590 
medicine-symptom links.
Verified:
Refreshed openFDA label-use data with 
scripts/update_medicine_catalog.php 200 openFDA.
/medicine.php?id=7644, /medicine.php?id=6, 
/nutrition.php?q=serdexmethylphenidate, 
/api.php?action=library_search&q=ADHD&limit=5, and / all returned 200.
Confirmed the page shows “What It Is Used For”, “Used for: ...”, and an 
openFDA label source link.
Stock php -l was not available in this workspace, but the FrankenPHP 
bootstrap and route/API smoke tests executed successfully.
Sources used: openFDA drug label fields and openFDA query parameters.

CHANGELOG.md

@@ -2,6 +2,46 @@
 
 All notable changes to Neon Medical Tracker are documented here.
 
+## [Unreleased] - 2026-07-03
+
+### Added
+
+- Added generated medicine-to-condition and medicine-to-symptom relationship tables.
+- Added dynamic medicine detail sections for linked conditions and linked symptom contexts.
+- Added dynamic condition and symptom sections for commonly linked medicines.
+- Added therapeutic-use enrichment rules so imported medicine rows can show practical common-use context when a clear category match exists.
+- Added expanded condition and symptom seed coverage across cardiovascular, respiratory, endocrine, GI, kidney, neurologic, mental health, dermatology, infectious disease, immune, ENT, reproductive, and general medical topics.
+- Added openFDA brand-name and substance-name buckets to the medicine source updater.
+- Added official medicine-use fields and source links populated from openFDA drug label `indications_and_usage` or `purpose` text.
+- Added computed `used_for` values to medicine API payloads so clients can display official label use text when available.
+
+### Changed
+
+- Increased the current SQLite snapshot to 7,646 medicines, 283 conditions, and 308 symptoms, including 200 openFDA label-derived use summaries.
+- Rebuilt generated relationship data to 8,077 medicine-to-condition links and 10,590 medicine-to-symptom links.
+- Updated medical library search so medicine searches can match linked conditions/symptoms, and condition/symptom searches can match linked medicines.
+- Updated medicine catalog, medicine detail, condition, symptom, terminology, and combined-library pages to show "what it is used for" text through one shared helper.
+- Updated relationship generation so official medicine-use label text participates in condition and symptom linking.
+- Updated openFDA refreshes to fetch label documents first, then fall back to generic, brand, and substance buckets for broader coverage.
+- Batched imported medicine upserts inside a SQLite transaction for faster source refreshes.
+- Increased SQLite busy timeout for safer first-run migrations and source refreshes.
+- Updated `README.md` with current counts, relationship data, and source-refresh behavior.
+
+### Fixed
+
+- Cleaned generated search terms when therapeutic relationship rules change so removed links do not linger in search.
+- Tightened relationship rules to avoid broad steroid and chemistry keyword false positives.
+- Fixed medicine pages that previously depended on `common_use` only, so medicines now show official "used for" text whenever it exists.
+
+### Verified
+
+- Refreshed public medicine sources with a 500-row-per-source run across RxNorm, DailyMed, and openFDA.
+- Refreshed openFDA label-use data with a 200-row run and verified 200 medicine rows have official use summaries.
+- Verified `/medicine.php?name=albuterol`, `/condition.php?name=Asthma`, `/symptom.php?name=Wheezing`, and `api.php?action=library_search&q=asthma&limit=10` return `200`.
+- Verified official-use medicine pages expose "What It Is Used For", `Used for:` label text, and an openFDA drug label source link.
+- Verified albuterol medicine pages show linked Asthma/Wheezing records and Asthma/Wheezing pages show linked albuterol medicines.
+- Verified stale adalimumab-to-asthma and celecoxib-to-UTI false positives are removed.
+
 ## [Unreleased] - 2026-06-30
 
 ### Added
@@ -58,7 +98,7 @@ All notable changes to Neon Medical Tracker are documented here.
 - Verified dynamic medicine, symptom, condition, and terminology routes return `200` for representative records.
 - Verified legacy `/signup.php` returns `302` to `/tracker.php`.
 - Verified `api.php?action=public_signup` returns `404`.
-- Verified current SQLite snapshot counts: 6,002 medicines, 242 symptoms, 203 conditions, 23 terms, and 9 research-link categories.
+- Verified then-current SQLite snapshot counts: 6,002 medicines, 242 symptoms, 203 conditions, 23 terms, and 9 research-link categories.
 - Verified browser layout checks for medicine, symptom, and terminology pages at desktop and mobile widths with no horizontal overflow.
 
 ## Earlier Scope