# SiteCheck Health & Travel – FDA Drug-Drug Interaction Label Lookup

> SiteCheck Health & Travel – FDA Drug-Drug Interaction Label Lookup is a paid API for AI agents from api.healthtravel-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).

Searches the FDA label (openFDA) of drug A for sentences mentioning drug B in the drug interactions section, returning matching text, label set ID, and effective date.

## Facts

- Endpoint: GET https://api.healthtravel-api.workers.dev/api/health/drugbank-interaction?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-health-travel-fda-drug-drug-interaction-label-lookup-12d39489
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZD9prAtyBgbF3uln7DQXX

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sitecheck-health-travel-fda-drug-drug-interaction-label-lookup-12d39489
```

Example prompt: Does the FDA label for warfarin mention any interaction with aspirin? Pull the exact sentences from the drug interactions section.

## When to prefer this

Use this endpoint when you need the verbatim FDA label text about a drug-drug interaction — specifically, what drug A's official structured product label says about drug B. Prefer this over clinical databases when regulatory label language is required (e.g., for compliance, pharmacovigilance, or documentation). Note: absence of a match does not mean no interaction exists; this is a label-text search, not a comprehensive interaction database.

## Known failure modes

- No sentences found — does not confirm absence of interaction, only absence of label mention
- Drug name not recognized or misspelled — no results returned
- Drug name too short (<2 chars) or too long (>60 chars) — validation error
- openFDA upstream unavailability causing timeout or empty response
- Brand names instead of generic names may fail to match

## How this service works

Drug-drug interaction text from the FDA label (openFDA) of drug A that mentions drug B: matching sentences from the label's drug interactions section, with label set ID and effective date. Label text only; no severity score. If no sentence matches, that does NOT mean there is no interaction.

## Output

Returns matching sentences from the FDA structured product label's drug interactions section where drug A's label mentions drug B, along with the label set ID and effective date. If no sentences match, it does not indicate the absence of an interaction — only that the label text does not explicitly mention drug B.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "drug",
      "with"
     ],
     "properties": {
      "drug": {
       "type": "string",
       "description": "Generic name of drug A, letters and spaces, 2 to 60 characters"
      },
      "with": {
       "type": "string",
       "description": "Generic name of drug B to look for in A's label, letters and spaces, 2 to 60 characters"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-health-travel-fda-drug-drug-interaction-label-lookup-12d39489/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.healthtravel-api.workers.dev](https://www.zero.xyz/host/api.healthtravel-api.workers.dev/llms.txt)