Brand <-> generic drug product mapping (RxNorm) API

Maps a drug name or RxCUI to its branded drug products (SBD) and generic clinical drug products (SCD), plus ingredients and brand names, so an agent can substitute between them. Answers 'What are the generic equivalents of Lipitor?', 'List branded products for atorvastatin'.

Price$0.01per request

MethodPOST

Route/v1/health/clinical-rxnorm-brand-generic

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache604800s public

healthclinicalrxnormdrugbrandgenericsubstitutionpharmacynlm

API URLhttps://x402.hexl.dev/v1/health/clinical-rxnorm-brand-generic

Integration docs

Example request

{
  "drug": "atorvastatin"
}

Example response

{
  "query": "atorvastatin",
  "rxcui": "83367",
  "name": "atorvastatin",
  "termType": "IN",
  "ingredients": [
    {
      "rxcui": "83367",
      "name": "atorvastatin"
    }
  ],
  "brandNames": [
    {
      "rxcui": "153165",
      "name": "Lipitor"
    },
    {
      "rxcui": "2631862",
      "name": "Atorvaliq"
    },
    {
      "rxcui": "404914",
      "name": "Caduet"
    }
  ],
  "brandedProducts": [
    {
      "rxcui": "262095",
      "name": "atorvastatin 80 MG Oral Tablet [Lipitor]"
    },
    {
      "rxcui": "2631867",
      "name": "atorvastatin 4 MG/ML Oral Suspension [Atorvaliq]"
    },
    {
      "rxcui": "617314",
      "name": "atorvastatin 10 MG Oral Tablet [Lipitor]"
    },
    {
      "rxcui": "617318",
      "name": "atorvastatin 20 MG Oral Tablet [Lipitor]"
    },
    {
      "rxcui": "617320",
      "name": "atorvastatin 40 MG Oral Tablet [Lipitor]"
    },
    {
      "rxcui": "750199",
      "name": "amlodipine 10 MG / atorvastatin 10 MG Oral Tablet [Caduet]"
    },
    {
      "rxcui": "750203",
      "name": "amlodipine 10 MG / atorvastatin 20 MG Oral Tablet [Caduet]"
    },
    {
      "rxcui": "750207",
      "name": "amlodipine 10 MG / atorvastatin 40 MG Oral Tablet [Caduet]"
    },
    {
      "rxcui": "750211",
      "name": "amlodipine 10 MG / atorvastatin 80 MG Oral Tablet [Caduet]"
    },
    {
      "rxcui": "750215",
      "name": "amlodipine 2.5 MG / atorvastatin 40 MG Oral Tablet [Caduet]"
    },
    {
      "rxcui": "750227",
      "name": "amlodipine 5 MG / atorvastatin 10 MG Oral Tablet [Caduet]"
    },
    {
      "rxcui": "750231",
      "name": "amlodipine 5 MG / atorvastatin 20 MG Oral Tablet [Caduet]"
    },
    {
      "rxcui": "750235",
      "name": "amlodipine 5 MG / atorvastatin 40 MG Oral Tablet [Caduet]"
    },
    {
      "rxcui": "750239",
      "name": "amlodipine 5 MG / atorvastatin 80 MG Oral Tablet [Caduet]"
    }
  ],
  "genericProducts": [
    {
      "rxcui": "1422093",
      "name": "atorvastatin 20 MG / ezetimibe 10 MG Oral Tablet"
    },
    {
      "rxcui": "1422096",
      "name": "atorvastatin 40 MG / ezetimibe 10 MG Oral Tablet"
    },
    {
      "rxcui": "1422099",
      "name": "atorvastatin 80 MG / ezetimibe 10 MG Oral Tablet"
    },
    {
      "rxcui": "259255",
      "name": "atorvastatin 80 MG Oral Tablet"
    },
    {
      "rxcui": "2630760",
      "name": "atorvastatin 4 MG/ML Oral Suspension"
    },
    {
      "rxcui": "404011",
      "name": "amlodipine 5 MG / atorvastatin 80 MG Oral Tablet"
    },
    {
      "rxcui": "404013",
      "name": "amlodipine 10 MG / atorvastatin 80 MG Oral Tablet"
    },
    {
      "rxcui": "597967",
      "name": "amlodipine 10 MG / atorvastatin 20 MG Oral Tablet"
    },
    {
      "rxcui": "597971",
      "name": "amlodipine 2.5 MG / atorvastatin 10 MG Oral Tablet"
    },
    {
      "rxcui": "597974",
      "name": "amlodipine 2.5 MG / atorvastatin 20 MG Oral Tablet"
    },
    {
      "rxcui": "597977",
      "name": "amlodipine 5 MG / atorvastatin 10 MG Oral Tablet"
    },
    {
      "rxcui": "597980",
      "name": "amlodipine 5 MG / atorvastatin 20 MG Oral Tablet"
    },
    {
      "rxcui": "597984",
      "name": "amlodipine 5 MG / atorvastatin 40 MG Oral Tablet"
    },
    {
      "rxcui": "597987",
      "name": "amlodipine 10 MG / atorvastatin 10 MG Oral Tablet"
    },
    {
      "rxcui": "597990",
      "name": "amlodipine 10 MG / atorvastatin 40 MG Oral Tablet"
    },
    {
      "rxcui": "597993",
      "name": "amlodipine 2.5 MG / atorvastatin 40 MG Oral Tablet"
    },
    {
      "rxcui": "617310",
      "name": "atorvastatin 20 MG Oral Tablet"
    },
    {
      "rxcui": "617311",
      "name": "atorvastatin 40 MG Oral Tablet"
    },
    {
      "rxcui": "617312",
      "name": "atorvastatin 10 MG Oral Tablet"
    }
  ],
  "codingSystem": "RxNorm",
  "disclaimer": "Informational reference/terminology data only — NOT medical advice. Verify against authoritative sources and a qualified professional before any clinical, billing, or treatment decision."
}

Input schema

{
  "type": "object",
  "required": [
    "drug"
  ],
  "properties": {
    "drug": {
      "type": "string",
      "description": "Drug name or RxCUI"
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}