Expand drug interactions CSV — add 500+ high-risk pairs from DrugBank open data

[sarvanithin]

Overview

The current drug_interactions.csv has ~50 manually curated pairs. DrugBank publishes a free open data extract with thousands of known interactions. Expanding this table improves offline drug safety coverage without any API calls.

Data source

DrugBank Open Data (CC BY-NC 4.0): https://go.drugbank.com/releases/latest#open-data
Download drugbank_all_drug_interactions.csv — contains drug pairs, severity, description.

What to do

1. Download the DrugBank open interactions CSV
2. Filter to severity = major and moderate
3. Normalize drug names to lowercase
4. Map to the existing CSV format: drug_a,drug_b,severity,description,source
5. Deduplicate against existing entries
6. PR with the expanded CSV (target: 500+ rows)

Files to modify

• medguard/knowledge/data/drug_interactions.csv — expand from ~50 to 500+ rows

Acceptance criteria

• CSV has 500+ unique drug pairs
• All drug names lowercase, consistent format
• No duplicate pairs
• Severity values: low, moderate, high, contraindicated
• Source column cites drugbank / openfda / manual

Notes

This is a data contribution — no code changes required, great for first-time contributors.
DrugBank open data license requires attribution — add to README data sources table.