Symptom: FUO

FUO: Fever of unknown origin (fever without known cause)
Detailed cause information for symptom: FUO:
  • Possible causes of symptom: FUO (18 conditions)
  • Medications or substances causing symptom: FUO (21 listings)
  • Medical conditions causing symptom: FUO (5 conditions)

    Medical articles on symptoms: These general medical articles may be of interest:

    FUO type of: Fever (279)
    Symptoms: symptom center, symptom groups, symptom descriptions

    Possible causes of symptom: FUO: The following medical conditions are some of the possible causes of FUO as a symptom. There are likely to be other possible causes, so ask your doctor about your symptoms.

    Medications or substances causing FUO: The following drugs, medications, substances or toxins are some of the possible causes of FUO as a symptom. This list is incomplete and various other drugs or substances may cause your symptoms. Always advise your doctor of any medications or treatments you are using, including prescription, over-the-counter, supplements, herbal or alternative treatments.
    • Certain antibiotics
    • Sulfa
    • Antihistamines
    • Barbiturates
      • Phenobarbital
      • Seconal
      • Nembutal
      • Tuinal
    • High blood pressure drugs
      • Hydralazine (Apresoline)
      • Methyldopa (Aldomet)
      • Thiazide diuretics
      • Hydrodiuril
      • Esidrix
      • Dyazide
      • Maxzide
      • Moduretic

    Conditions listing symptoms: FUO: The following list of conditions have 'FUO' or similar listed as a symptom in our database. This computer-generated list may be inaccurate or incomplete. Always seek prompt professional medical advice about the cause of any symptom.


  • HIV/AIDS ... frequent low-grade fevers
  • Hodgkin's Disease ... recurring intermittent fever, Unexplained recurrent fevers


  • Krabbé Disease ... unexplained fevers


  • Lupus ... unexplained fever


  • Non-Hodgkin's Lymphoma ... Unexplained fever

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