{
  "meta": {
    "disclaimer": "Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated. We may limit or otherwise restrict your access to the API in line with our Terms of Service.",
    "terms": "https://open.fda.gov/terms/",
    "license": "https://open.fda.gov/license/",
    "last_updated": "2026-04-28"
  },
  "results": [
    {
      "term": "OFF LABEL USE",
      "count": 598
    },
    {
      "term": "CYTOMEGALOVIRUS INFECTION",
      "count": 260
    },
    {
      "term": "CYTOMEGALOVIRUS INFECTION REACTIVATION",
      "count": 247
    },
    {
      "term": "MUCOSAL INFLAMMATION",
      "count": 235
    },
    {
      "term": "DRUG INEFFECTIVE",
      "count": 229
    },
    {
      "term": "PRODUCT USE IN UNAPPROVED INDICATION",
      "count": 225
    },
    {
      "term": "ADENOVIRUS INFECTION",
      "count": 205
    },
    {
      "term": "ACUTE GRAFT VERSUS HOST DISEASE IN SKIN",
      "count": 198
    },
    {
      "term": "GRAFT VERSUS HOST DISEASE IN SKIN",
      "count": 145
    },
    {
      "term": "ACUTE GRAFT VERSUS HOST DISEASE",
      "count": 130
    },
    {
      "term": "PYREXIA",
      "count": 129
    },
    {
      "term": "GRAFT VERSUS HOST DISEASE IN GASTROINTESTINAL TRACT",
      "count": 123
    },
    {
      "term": "MULTIPLE ORGAN DYSFUNCTION SYNDROME",
      "count": 122
    },
    {
      "term": "HUMAN HERPESVIRUS 6 INFECTION",
      "count": 119
    },
    {
      "term": "NEUTROPENIA",
      "count": 116
    },
    {
      "term": "GRAFT VERSUS HOST DISEASE",
      "count": 98
    },
    {
      "term": "FEBRILE NEUTROPENIA",
      "count": 96
    },
    {
      "term": "EPSTEIN-BARR VIRUS INFECTION",
      "count": 92
    },
    {
      "term": "SEPSIS",
      "count": 90
    },
    {
      "term": "THROMBOCYTOPENIA",
      "count": 86
    },
    {
      "term": "CYTOMEGALOVIRUS VIRAEMIA",
      "count": 84
    },
    {
      "term": "ACUTE GRAFT VERSUS HOST DISEASE IN INTESTINE",
      "count": 81
    },
    {
      "term": "DIARRHOEA",
      "count": 78
    },
    {
      "term": "PRODUCT USE ISSUE",
      "count": 76
    },
    {
      "term": "RASH",
      "count": 76
    },
    {
      "term": "INTENTIONAL PRODUCT USE ISSUE",
      "count": 72
    },
    {
      "term": "BK VIRUS INFECTION",
      "count": 69
    },
    {
      "term": "CHRONIC GRAFT VERSUS HOST DISEASE",
      "count": 67
    },
    {
      "term": "ACUTE KIDNEY INJURY",
      "count": 66
    },
    {
      "term": "STAPHYLOCOCCAL INFECTION",
      "count": 66
    },
    {
      "term": "POSTERIOR REVERSIBLE ENCEPHALOPATHY SYNDROME",
      "count": 65
    },
    {
      "term": "VENOOCCLUSIVE LIVER DISEASE",
      "count": 64
    },
    {
      "term": "DISEASE PROGRESSION",
      "count": 60
    },
    {
      "term": "HYPERTENSION",
      "count": 60
    },
    {
      "term": "RESPIRATORY FAILURE",
      "count": 60
    },
    {
      "term": "INFECTION",
      "count": 59
    },
    {
      "term": "THROMBOTIC MICROANGIOPATHY",
      "count": 55
    },
    {
      "term": "ADENOVIRUS REACTIVATION",
      "count": 53
    },
    {
      "term": "SKIN TOXICITY",
      "count": 53
    },
    {
      "term": "PNEUMONITIS",
      "count": 49
    },
    {
      "term": "VARICELLA ZOSTER VIRUS INFECTION",
      "count": 49
    },
    {
      "term": "DRUG INEFFECTIVE FOR UNAPPROVED INDICATION",
      "count": 48
    },
    {
      "term": "EPSTEIN-BARR VIRUS INFECTION REACTIVATION",
      "count": 47
    },
    {
      "term": "RENAL IMPAIRMENT",
      "count": 47
    },
    {
      "term": "NAUSEA",
      "count": 46
    },
    {
      "term": "PNEUMONIA",
      "count": 46
    },
    {
      "term": "VOMITING",
      "count": 46
    },
    {
      "term": "AUTOIMMUNE HAEMOLYTIC ANAEMIA",
      "count": 45
    },
    {
      "term": "POST TRANSPLANT LYMPHOPROLIFERATIVE DISORDER",
      "count": 44
    },
    {
      "term": "RENAL FAILURE",
      "count": 43
    },
    {
      "term": "VIRAL HAEMORRHAGIC CYSTITIS",
      "count": 43
    },
    {
      "term": "ACUTE RESPIRATORY DISTRESS SYNDROME",
      "count": 42
    },
    {
      "term": "CHRONIC GRAFT VERSUS HOST DISEASE IN SKIN",
      "count": 42
    },
    {
      "term": "CYTOMEGALOVIRUS CHORIORETINITIS",
      "count": 42
    },
    {
      "term": "VIRAL INFECTION",
      "count": 41
    },
    {
      "term": "ANAEMIA",
      "count": 39
    },
    {
      "term": "LEUKOPENIA",
      "count": 38
    },
    {
      "term": "NOROVIRUS INFECTION",
      "count": 38
    },
    {
      "term": "THERAPY NON-RESPONDER",
      "count": 38
    },
    {
      "term": "DRUG RESISTANCE",
      "count": 37
    },
    {
      "term": "FUNGAL INFECTION",
      "count": 37
    },
    {
      "term": "HAEMOPHAGOCYTIC LYMPHOHISTIOCYTOSIS",
      "count": 37
    },
    {
      "term": "VIRAEMIA",
      "count": 37
    },
    {
      "term": "HEPATIC FAILURE",
      "count": 35
    },
    {
      "term": "IMMUNE RECONSTITUTION INFLAMMATORY SYNDROME",
      "count": 35
    },
    {
      "term": "TRANSPLANT REJECTION",
      "count": 35
    },
    {
      "term": "DISEASE RECURRENCE",
      "count": 33
    },
    {
      "term": "HERPES SIMPLEX",
      "count": 33
    },
    {
      "term": "ASCITES",
      "count": 32
    },
    {
      "term": "CYTOMEGALOVIRUS COLITIS",
      "count": 32
    },
    {
      "term": "EPSTEIN-BARR VIRAEMIA",
      "count": 32
    },
    {
      "term": "IMMUNE THROMBOCYTOPENIA",
      "count": 32
    },
    {
      "term": "PERICARDIAL EFFUSION",
      "count": 32
    },
    {
      "term": "VENOOCCLUSIVE DISEASE",
      "count": 32
    },
    {
      "term": "INFECTION REACTIVATION",
      "count": 31
    },
    {
      "term": "STOMATITIS",
      "count": 31
    },
    {
      "term": "TOXICITY TO VARIOUS AGENTS",
      "count": 30
    },
    {
      "term": "BRONCHOPULMONARY ASPERGILLOSIS",
      "count": 28
    },
    {
      "term": "HERPES ZOSTER",
      "count": 28
    },
    {
      "term": "IDIOPATHIC PNEUMONIA SYNDROME",
      "count": 28
    },
    {
      "term": "SEPTIC SHOCK",
      "count": 28
    },
    {
      "term": "PANCYTOPENIA",
      "count": 27
    },
    {
      "term": "PERINEAL ULCERATION",
      "count": 27
    },
    {
      "term": "PSEUDOMONAS INFECTION",
      "count": 27
    },
    {
      "term": "ABDOMINAL PAIN",
      "count": 26
    },
    {
      "term": "CYSTITIS HAEMORRHAGIC",
      "count": 26
    },
    {
      "term": "DEATH",
      "count": 26
    },
    {
      "term": "DISSEMINATED BACILLUS CALMETTE-GUERIN INFECTION",
      "count": 26
    },
    {
      "term": "ACUTE MYELOID LEUKAEMIA",
      "count": 25
    },
    {
      "term": "CONVULSION",
      "count": 25
    },
    {
      "term": "PARVOVIRUS B19 INFECTION",
      "count": 25
    },
    {
      "term": "PNEUMATOSIS INTESTINALIS",
      "count": 25
    },
    {
      "term": "RETINAL HAEMORRHAGE",
      "count": 25
    },
    {
      "term": "BACTERAEMIA",
      "count": 24
    },
    {
      "term": "CAPILLARY LEAK SYNDROME",
      "count": 24
    },
    {
      "term": "ENTEROCOLITIS",
      "count": 24
    },
    {
      "term": "HYPOGAMMAGLOBULINAEMIA",
      "count": 24
    },
    {
      "term": "PNEUMONIA CYTOMEGALOVIRAL",
      "count": 24
    },
    {
      "term": "PNEUMONIA RESPIRATORY SYNCYTIAL VIRAL",
      "count": 24
    },
    {
      "term": "TREATMENT FAILURE",
      "count": 24
    }
  ]
}