# Drug Interactions Label Lookup

> Drug Interactions Label Lookup is a paid API for AI agents from api.agentstools.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Retrieves the drug-interactions section of an FDA drug label by drug name, with an optional check for whether a second drug is mentioned in that section.

## Facts

- Endpoint: GET https://api.agentstools.dev/drug/interactions
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/drug-interactions-label-lookup-f258d039
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xtOq-tsuTMYeVhbShQVIp

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 drug-interactions-label-lookup-f258d039
```

Example prompt: What does the FDA drug label say about interactions for warfarin — and does it specifically mention aspirin?

## When to prefer this

Use this endpoint when you need to surface the official FDA label interactions text for a specific drug — especially when you want to check whether a second drug is explicitly called out in that label. Prefer this over general drug interaction databases when the goal is label-level regulatory text rather than clinical decision support. Best suited for informational lookups, research, or drafting summaries that reference official labeling language.

## Known failure modes

- Drug name not found in FDA label database — returns 404 or empty result
- Misspelled or unrecognized drug name yields no match
- Second drug name not found mentioned in interactions section — returns negative/false flag
- Label exists but has no interactions section — returns empty or null section
- Rate limiting or payment failure — returns 402 or 429
- Ambiguous drug name with multiple matches may return one variant without disambiguation

## How this service works

Drug-interactions label section for a drug by name, with an optional check of whether the label mentions a second drug. A label-text heuristic, informational, not medical advice.

## Output

Returns the drug-interactions section text from the FDA-approved label for the specified drug. If a second drug name is provided via 'interacts_with', also returns a boolean or indicator of whether that second drug is mentioned in the interactions section. Results are informational label text only, not clinical advice.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "drug"
     ],
     "properties": {
      "drug": {
       "type": "string",
       "description": "Primary drug brand, generic or ingredient name"
      },
      "interacts_with": {
       "type": "string",
       "description": "Optional second drug to check for a mention in the first drug's interactions section"
      }
     }
    }
   },
   "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/drug-interactions-label-lookup-f258d039/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.agentstools.dev](https://www.zero.xyz/host/api.agentstools.dev/llms.txt)