RxLabelGuardDrug Interaction API
FDA Label Data

Drug interaction data shouldn't cost six figures

RxLabelGuard extracts interaction data from FDA Structured Product Labeling and returns it as structured JSON with severity scores and evidence citations. Free to start. $20/month for production.

Built for EHR integrators, pharmacy systems, and clinical decision support teams.

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API Request
curl https://api.rxlabelguard.com/v1/interactions \
  -H "Authorization: Bearer rxlg_your_api_key" \
  -d '{"drugs": ["warfarin", "aspirin"]}'

# Response
{
  "interactions": [{
    "drug_a": "warfarin",
    "drug_b": "aspirin",
    "severity": "major",
    "mechanism": "Additive anticoagulant effect",
    "recommendation": "Monitor INR closely",
    "evidence": {
      "source": "FDA SPL",
      "spl_set_id": "ab12cd34-..."
    }
  }]
}

Everything you need for drug safety checks

From drug name resolution to structured interaction data, RxLabelGuard handles the complexity so your team can focus on building.

Smart Drug Resolution

Send a drug name, NDC code, or RxCUI. We resolve it to the correct FDA label via RxNorm, so your integration handles 'warfarin' and 'Coumadin' the same way.

Interaction Extraction

FDA labels bury interactions in free-text paragraphs. We extract each pair, classify severity, identify the mechanism, and return a recommendation — as structured JSON.

Severity Scoring

Every interaction gets a severity level: contraindicated, major, moderate, minor, or unknown. Map these directly to your clinical alert tiers.

Evidence Citations

When someone asks 'where did this alert come from?' — every result includes the SPL Set ID, label section, and the text snippet used for extraction.

Developer Portal

Generate API keys, set per-key rate limits, restrict by IP, and track usage from a self-service dashboard. No emails to support to get started.

Enterprise Controls

Manage team members, enforce per-user quotas, suspend keys instantly, and apply restriction policies. Governance built for organizations.

Three steps to safer prescribing

Integrate drug interaction checks into your application in minutes, not months.

1

Get an API key

Create your free account, generate an API key from the developer dashboard, and start making requests immediately.

2

Send drug names

Pass drug names, NDC codes, or RxCUI identifiers. We resolve them against FDA labels and extract interaction data.

3

Get structured data

Receive interaction pairs with severity levels, mechanisms, recommendations, and evidence citations from FDA labeling.

Data Source

Data you can trace to the source

Every interaction result links to a specific FDA label. Your compliance team can verify any alert against the original Structured Product Labeling document. The same data pharmacists and clinicians reference daily — structured for your application.

  • Sourced from FDA Structured Product Labeling via openFDA
  • Covers drug interactions, warnings, contraindications, and boxed warnings
  • SPL Set ID, label section, and evidence snippet in every response
  • Updated as the FDA revises product labels

This data is derived from FDA labeling for software integration purposes. Not a substitute for clinical judgment. Consult a qualified healthcare provider for patient care decisions.

Why FDA Label Data?

Enterprise drug data vendors repackage FDA data and charge $50K-$200K/year. We go directly to the source — the same FDA Structured Product Labeling that those databases build on — and structure it for you at a fraction of the cost.

Every interaction claim is traceable to a specific label section and document ID. No proprietary black box.

Start free, scale as you grow

Every plan includes FDA-sourced interaction data, severity scoring, and evidence citations.

Sandbox
$0/mo

50 requests/month, 1 API key

Developer
$20/mo

2,000 requests/month, 5 API keys

Professional
$99/mo

20,000 requests/month, unlimited keys

View full pricing details

Ship interaction checks this week, not next quarter

Free tier. No credit card. No sales calls. Get an API key and make your first request in minutes.

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