[
  {
    "phenotype_id": "PH2118",
    "phenotype_version_id": 4829,
    "name": "Melatonin drugs (LDO)",
    "definition": "This codelist was taken from [OpenCodelists](https://www.opencodelists.org/), created by [OpenSAFELY](https://www.opensafely.org/). We recommend viewing this Phenotype on the OpenCodelist website to view the most recent version.\n\n\nTaken from the `MELATONINDRUG_COD` NHS drug refset. Contains public sector information licensed under the UK Open Government Licence v3\\.0 (https://www.nationalarchives.gov.uk/doc/open\\-government\\-licence/version/3/).\n\n\n© University of Oxford for the Bennett Institute for Applied Data Science 2025\\. This work may be copied freely for non\\-commercial research and study.\n\n",
    "implementation": null,
    "publications": null,
    "validation": null,
    "citation_requirements": null,
    "created": "2026-01-26T21:49:03.014797Z",
    "author": "NHS Drug Refsets",
    "collections": [
      {
        "name": "OpenCodelist",
        "value": 31
      },
      {
        "name": "Phenotype Library",
        "value": 18
      }
    ],
    "tags": null,
    "organisation": {
      "id": 1,
      "slug": "opensafely",
      "name": "OpenSAFELY"
    },
    "world_access": 1,
    "updated": "2026-01-26T21:49:04.803523Z",
    "references": [],
    "signed_off": [],
    "methodology": "",
    "coding_system": [
      {
        "name": "dm+d codes",
        "value": 23
      }
    ],
    "open_codelist_id": "nhs-drug-refsets/melatonindrug_cod",
    "source_reference": "https://www.opencodelists.org/codelist/nhs-drug-refsets/melatonindrug_cod/20250912",
    "concept_information": [
      {
        "concept_id": 5006,
        "concept_version_id": 12491,
        "concept_name": "nhs-drug-refsets/melatonindrug_cod/20250912",
        "coding_system": {
          "id": 23,
          "name": "dm+d codes",
          "description": "dm+d codes"
        },
        "phenotype_id": "PH2118",
        "phenotype_version_id": 4829,
        "phenotype_name": "Melatonin drugs (LDO)",
        "code_attribute_header": [],
        "codes": [
          {
            "code": "10516511000001100",
            "description": "Melatonin 1mg/ml oral solution (VMP)",
            "attributes": null
          },
          {
            "code": "10522611000001109",
            "description": "Melatonin 1mg/ml oral solution (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "10792111000001108",
            "description": "Melatonin 3mg lozenges sugar free (VMP)",
            "attributes": null
          },
          {
            "code": "10792311000001105",
            "description": "Melatonin 3mg lozenges sugar free (Imported (United States)) (AMP)",
            "attributes": null
          },
          {
            "code": "11479611000001102",
            "description": "Melatonin 2mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "11483911000001100",
            "description": "Melatonin 5mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "11485711000001101",
            "description": "Melatonin 3mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "11490311000001108",
            "description": "Melatonin 2mg capsules (VMP)",
            "attributes": null
          },
          {
            "code": "12688111000001106",
            "description": "Melatonin 2mg/5ml oral suspension (Drug Tariff Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "12688711000001107",
            "description": "Melatonin 2mg/5ml oral solution (Drug Tariff Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "12689011000001100",
            "description": "Melatonin 3mg/5ml oral suspension (Drug Tariff Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "12689311000001102",
            "description": "Melatonin 3mg/5ml oral solution (Drug Tariff Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "12689611000001107",
            "description": "Melatonin 4mg/5ml oral suspension (Drug Tariff Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "12689911000001101",
            "description": "Melatonin 4mg/5ml oral solution (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "12700111000001104",
            "description": "Melatonin 2mg/5ml oral solution (VMP)",
            "attributes": null
          },
          {
            "code": "12700211000001105",
            "description": "Melatonin 2mg/5ml oral suspension (VMP)",
            "attributes": null
          },
          {
            "code": "12700311000001102",
            "description": "Melatonin 3mg/5ml oral solution (VMP)",
            "attributes": null
          },
          {
            "code": "12700411000001109",
            "description": "Melatonin 3mg/5ml oral suspension (VMP)",
            "attributes": null
          },
          {
            "code": "12700511000001108",
            "description": "Melatonin 4mg/5ml oral solution (VMP)",
            "attributes": null
          },
          {
            "code": "12700611000001107",
            "description": "Melatonin 4mg/5ml oral suspension (VMP)",
            "attributes": null
          },
          {
            "code": "13506111000001105",
            "description": "Circadin 2mg modified-release tablets (Flynn Pharma Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "14027611000001106",
            "description": "Melatonin 5mg/5ml oral solution (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "14027911000001100",
            "description": "Melatonin 5mg/5ml oral suspension (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "14034311000001107",
            "description": "Melatonin 3mg tablets (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "14056711000001101",
            "description": "Melatonin 5mg/5ml oral solution (VMP)",
            "attributes": null
          },
          {
            "code": "14056911000001104",
            "description": "Melatonin 5mg/5ml oral suspension (VMP)",
            "attributes": null
          },
          {
            "code": "14239411000001108",
            "description": "Melatonin 10mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "14533711000001107",
            "description": "Melatonin 4mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "14576911000001100",
            "description": "Melatonin 4mg capsules (VMP)",
            "attributes": null
          },
          {
            "code": "15233411000001100",
            "description": "Melatonin 1mg/5ml oral solution (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "15233711000001106",
            "description": "Melatonin 1mg/5ml oral suspension (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "15241711000001106",
            "description": "Melatonin 10mg/5ml oral solution (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "15242011000001101",
            "description": "Melatonin 10mg/5ml oral suspension (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "15242911000001102",
            "description": "Melatonin 10mg/5ml oral solution (VMP)",
            "attributes": null
          },
          {
            "code": "15243011000001105",
            "description": "Melatonin 10mg/5ml oral suspension (VMP)",
            "attributes": null
          },
          {
            "code": "15243111000001106",
            "description": "Melatonin 1mg/5ml oral solution (VMP)",
            "attributes": null
          },
          {
            "code": "15243211000001100",
            "description": "Melatonin 1mg/5ml oral suspension (VMP)",
            "attributes": null
          },
          {
            "code": "15641311000001109",
            "description": "Melatonin 6mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "15649311000001108",
            "description": "Melatonin 6mg capsules (VMP)",
            "attributes": null
          },
          {
            "code": "15856411000001100",
            "description": "Melatonin 6mg/5ml oral solution (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "15856711000001106",
            "description": "Melatonin 6mg/5ml oral suspension (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "15857311000001105",
            "description": "Melatonin 6mg/5ml oral solution (VMP)",
            "attributes": null
          },
          {
            "code": "15857411000001103",
            "description": "Melatonin 6mg/5ml oral suspension (VMP)",
            "attributes": null
          },
          {
            "code": "15874711000001104",
            "description": "Melatonin 20mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "15875111000001101",
            "description": "Melatonin 500microgram tablets (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "15882411000001105",
            "description": "Melatonin 2mg tablets (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "15882711000001104",
            "description": "Melatonin 5mg tablets (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "15914311000001102",
            "description": "Melatonin 2mg tablets (VMP)",
            "attributes": null
          },
          {
            "code": "15914411000001109",
            "description": "Melatonin 5mg tablets (VMP)",
            "attributes": null
          },
          {
            "code": "16149611000001102",
            "description": "Circadin 2mg modified-release tablets (Lexon (UK) Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "16200811000001100",
            "description": "Circadin 2mg modified-release tablets (Waymade Healthcare Plc) (AMP)",
            "attributes": null
          },
          {
            "code": "16502911000001102",
            "description": "Circadin 2mg modified-release tablets (Mawdsley-Brooks & Company Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "17535211000001109",
            "description": "Circadin 2mg modified-release tablets (Sigma Pharmaceuticals Plc) (AMP)",
            "attributes": null
          },
          {
            "code": "18489611000001100",
            "description": "Circadin 2mg modified-release tablets (Necessity Supplies Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "18569111000001100",
            "description": "Circadin 2mg modified-release tablets (DE Pharmaceuticals) (AMP)",
            "attributes": null
          },
          {
            "code": "22512311000001103",
            "description": "Melatonin 2mg capsules (Alissa Healthcare Research Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "22512511000001109",
            "description": "Melatonin 3mg capsules (Alissa Healthcare Research Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "22512811000001107",
            "description": "Melatonin 5mg capsules (Alissa Healthcare Research Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "23611211000001103",
            "description": "Melatonin 3mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "23670311000001107",
            "description": "Melatonin 3mg orodispersible tablets (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "23676011000001107",
            "description": "Melatonin 3mg orodispersible tablets (VMP)",
            "attributes": null
          },
          {
            "code": "24015711000001100",
            "description": "Melatonin 2mg capsules (Imported (Denmark)) (AMP)",
            "attributes": null
          },
          {
            "code": "24015911000001103",
            "description": "Melatonin 3mg capsules (Imported (Denmark)) (AMP)",
            "attributes": null
          },
          {
            "code": "27878311000001106",
            "description": "Melatonin 2.5mg/5ml oral solution (Drug Tariff Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "28012811000001102",
            "description": "Melatonin 2.5mg/5ml oral solution (VMP)",
            "attributes": null
          },
          {
            "code": "28413211000001101",
            "description": "Icenia Melatonin 3mg capsules (Imported (Bulgaria)) (AMP)",
            "attributes": null
          },
          {
            "code": "28702811000001101",
            "description": "Melatonin 2mg modified-release capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "28772811000001108",
            "description": "Melatonin 2mg modified-release capsules (VMP)",
            "attributes": null
          },
          {
            "code": "29666311000001104",
            "description": "Melatonin 8mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "29670011000001106",
            "description": "Melatonin 8mg capsules (VMP)",
            "attributes": null
          },
          {
            "code": "30050511000001105",
            "description": "Melatonin 3mg modified-release tablets (Imported (United States)) (AMP)",
            "attributes": null
          },
          {
            "code": "30050711000001100",
            "description": "Melatonin Extra Strength 5mg tablets (Imported (United States)) (AMP)",
            "attributes": null
          },
          {
            "code": "30104111000001109",
            "description": "Melatonin 3mg modified-release tablets (VMP)",
            "attributes": null
          },
          {
            "code": "32709011000001106",
            "description": "Melatonin 15mg/5ml oral suspension (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "32724511000001105",
            "description": "Melatonin 7mg/5ml oral solution (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "32726111000001108",
            "description": "Melatonin 7.5mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "32749611000001105",
            "description": "Melatonin 15mg/5ml oral suspension (VMP)",
            "attributes": null
          },
          {
            "code": "32749711000001101",
            "description": "Melatonin 7.5mg capsules (VMP)",
            "attributes": null
          },
          {
            "code": "32749811000001109",
            "description": "Melatonin 7mg/5ml oral solution (VMP)",
            "attributes": null
          },
          {
            "code": "32864311000001107",
            "description": "Melatonin 7mg/5ml oral suspension (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "32878011000001105",
            "description": "Melatonin 7mg/5ml oral suspension (VMP)",
            "attributes": null
          },
          {
            "code": "34348511000001108",
            "description": "Melatonin 7mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "34354811000001101",
            "description": "Melatonin 10mg tablets (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "34377911000001103",
            "description": "Melatonin 10mg tablets (VMP)",
            "attributes": null
          },
          {
            "code": "34378011000001101",
            "description": "Melatonin 7mg capsules (VMP)",
            "attributes": null
          },
          {
            "code": "34430311000001109",
            "description": "Melatonin 4mg tablets (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "34447811000001100",
            "description": "Melatonin 4mg tablets (VMP)",
            "attributes": null
          },
          {
            "code": "34803311000001100",
            "description": "Melatonin 1mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "34803611000001105",
            "description": "Melatonin 1mg tablets (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "34803911000001104",
            "description": "Melatonin 2.5mg capsules (Part VIIID Drug Tariff Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "34804211000001106",
            "description": "Melatonin 3mg lozenges sugar free (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "34804511000001109",
            "description": "Melatonin 3mg modified-release capsules (Part VIIID Drug Tariff Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "34804811000001107",
            "description": "Melatonin 3mg modified-release tablets (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "34805111000001101",
            "description": "Melatonin 500microgram capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "34805411000001106",
            "description": "Melatonin 5mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "34847811000001105",
            "description": "Icenia Melatonin 2mg capsules (Imported (Bulgaria)) (AMP)",
            "attributes": null
          },
          {
            "code": "34848011000001103",
            "description": "Icenia Melatonin 5mg capsules (Imported (Bulgaria)) (AMP)",
            "attributes": null
          },
          {
            "code": "35569311000001107",
            "description": "Melatonin 6mg tablets (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "35575011000001101",
            "description": "Melatonin 6mg tablets (VMP)",
            "attributes": null
          },
          {
            "code": "35833611000001105",
            "description": "Melatonin 2.5mg tablets (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "35839411000001109",
            "description": "Melatonin 2.5mg tablets (VMP)",
            "attributes": null
          },
          {
            "code": "36454211000001100",
            "description": "Melatonin 8mg/5ml oral solution (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "36454511000001102",
            "description": "Melatonin 1mg/ml oral drops (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "36459611000001104",
            "description": "Melatonin 1mg/ml oral drops (VMP)",
            "attributes": null
          },
          {
            "code": "36459711000001108",
            "description": "Melatonin 8mg/5ml oral solution (VMP)",
            "attributes": null
          },
          {
            "code": "36800811000001108",
            "description": "Slenyto 1mg modified-release tablets (Flynn Pharma Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "36801111000001107",
            "description": "Slenyto 5mg modified-release tablets (Flynn Pharma Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "36811611000001101",
            "description": "Melatonin 1mg modified-release tablets (VMP)",
            "attributes": null
          },
          {
            "code": "36811911000001107",
            "description": "Melatonin 5mg modified-release tablets (VMP)",
            "attributes": null
          },
          {
            "code": "36891511000001101",
            "description": "Melatonin 9mg capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "36891911000001108",
            "description": "Melatonin 6mg modified-release capsules (Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "36904511000001106",
            "description": "Melatonin 6mg modified-release capsules (VMP)",
            "attributes": null
          },
          {
            "code": "36904611000001105",
            "description": "Melatonin 9mg capsules (VMP)",
            "attributes": null
          },
          {
            "code": "37011911000001107",
            "description": "Melatonin 3mg tablets (Colonis Pharma Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "37344811000001108",
            "description": "Melatonin 1mg/ml oral solution sugar free (Colonis Pharma Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "37406111000001108",
            "description": "Melatonin 1mg/ml oral solution sugar free (VMP)",
            "attributes": null
          },
          {
            "code": "37483211000001105",
            "description": "Melatonin 1mg/ml oral solution sugar free (A A H Pharmaceuticals Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "37483411000001109",
            "description": "Melatonin 3mg tablets (A A H Pharmaceuticals Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "37489811000001108",
            "description": "Melatonin 1mg/ml oral solution sugar free (Alliance Healthcare (Distribution) Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "37490011000001106",
            "description": "Melatonin 3mg tablets (Alliance Healthcare (Distribution) Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "37624511000001100",
            "description": "Circadin 2mg modified-release tablets (Ethigen Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "37802811000001105",
            "description": "Melatonin 5mg/5ml oral solution alcohol free (Drug Tariff Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "37803111000001109",
            "description": "Melatonin 5mg/5ml oral suspension alcohol free (Drug Tariff Special Order) (AMP)",
            "attributes": null
          },
          {
            "code": "37991311000001101",
            "description": "Melatonin 3mg tablets (Pharma Nord (UK) Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "38719211000001107",
            "description": "Melatonin 2mg modified-release tablets (Viatris UK Healthcare Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "38768211000001103",
            "description": "Melatonin 3mg capsules (Colonis Pharma Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "38768711000001105",
            "description": "Melatonin 2mg capsules (Colonis Pharma Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "38770211000001105",
            "description": "Melatonin 5mg capsules (Colonis Pharma Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "38830111000001104",
            "description": "Syncrodin 3mg tablets (Pharma Nord (UK) Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "39035711000001107",
            "description": "Melatonin 3mg tablets (Medihealth (Northern) Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "39080211000001104",
            "description": "Melatonin 2mg capsules (Alliance Healthcare (Distribution) Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "39080811000001103",
            "description": "Melatonin 3mg capsules (Alliance Healthcare (Distribution) Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "39081011000001100",
            "description": "Melatonin 5mg capsules (Alliance Healthcare (Distribution) Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "39319711000001102",
            "description": "Melatonin 3mg capsules (A A H Pharmaceuticals Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "39319911000001100",
            "description": "Melatonin 5mg capsules (A A H Pharmaceuticals Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "39364311000001103",
            "description": "Melatonin 2mg capsules (A A H Pharmaceuticals Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "39563111000001104",
            "description": "Melatonin 2mg modified-release tablets (A A H Pharmaceuticals Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "40031411000001102",
            "description": "Ceyesto 3mg tablets (Alturix Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "40164711000001105",
            "description": "Melatonin 2mg modified-release tablets (Teva UK Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "40326011000001103",
            "description": "Melatonin 2mg capsules (Medihealth (Northern) Ltd) (AMP)",
            "attributes": null
          },
          {
            "code": "40361811000001108",
            "description": "Melatonin 1mg/ml oral solution sugar free (DE Pharmaceuticals) (AMP)",
            "attributes": null
          },
          {
            "code": "40362011000001105",
            "description": "Melatonin 2mg capsules (DE Pharmaceuticals) (AMP)",
            "attributes": null
          },
          {
            "code": "40362211000001100",
            "description": "Melatonin 3mg capsules (DE Pharmaceuticals) (AMP)",
            "attributes": null
          },
          {
            "code": "40362711000001107",
            "description": "Melatonin 5mg capsules (DE Pharmaceuticals) (AMP)",
            "attributes": null
          },
          {
            "code": "40363311000001103",
            "description": "Melatonin 2mg modified-release tablets (DE Pharmaceuticals) (AMP)",
            "attributes": null
          },
          {
            "code": "40363611000001108",
            "description": "Melatonin 3mg tablets (DE Pharmaceuticals) (AMP)",
            "attributes": null
          },
          {
            "code": "40484711000001107",
            "description": "Adaflex 1mg tablets (AGB-Pharma) (AMP)",
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          },
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