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openFDA API: A Practical Guide for Drug-Data Developers

2026-10-01 · pharmaceutical compliance · openFDA data

What openFDA is

openFDA is the FDA's public JSON API. It exposes drug approvals, labeling, and recalls (enforcement) through HTTP endpoints — no API key required, no paid tier.

It is the cleanest free source for machine-readable drug data, and the foundation of feeds that turn raw FDA records into structured signals.

The endpoints that matter

Enforcement (`/drug/enforcement.json`) returns recall records: report date, recalling firm, product description, reason, and classification. This is the recall-signal endpoint.

Drugs@FDA (`/drug/drugsfda.json`) returns approval profiles: brand, generic, route, substances, and application data. A brand-name lookup lands on this.

Labeling (`/drug/label.json`) returns structured product labels — the richest free source of structured drug facts for research and compliance.

Query syntax and limits

The API accepts `search=` filters and `limit=`/`skip=` for pagination. Example: `?search=openfda.brand_name:"aspirin"&limit=3` returns matching drug profiles.

Rate limits are generous for this class of API (thousands of requests per hour are fine), so a modest polling loop can track new recalls cost-effectively.

Building a feed on top

A robust feed sorts by a monotonic field (e.g. `report_date`), filters to the fields you care about (classification, firm, product), and is idempotent — your agent can poll without double-counting.

openFDA is genuinely free and reliable, which makes it the right default for a drug-signal service.

Frequently asked

Does openFDA need an API key?

No. openFDA is free and keyless for standard use.

How do I find a drug by NDC?

Use the drugs@FDA endpoint with an openfda filter, or resolve the NDC directly.

Is openFDA data current?

It reflects FDA published data; enforcement reports are updated as the FDA releases them.

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