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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

## Causes

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### Common Causes

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Fever is a common symptom of many medical conditions:

* Infectious disease, e.g. influenza, common cold, HIV, malaria, infectious mononucleosis, or gastroenteritis.
* Various skin inflammations, e.g. boils, pimples, acne, or abscess.
* Immunological diseases, e.g. lupus erythematosus, sarcoidosis, inflammatory bowel diseases.
* Tissue destruction, which can occur in hemolysis, surgery, infarction, crush syndrome, rhabdomyolysis, cerebral hemorrhage, etc.
* Drug fever
* Directly caused by the drug, e.g. lamictal, progesterone, or chemotherapeutics causing tumor necrosis.
* As an adverse reaction to drugs, e.g. antibiotics or sulfa drugs.
* After drug discontinuation, e.g. heroin withdrawal.
* Cancers, e.g. Hodgkin disease.
* Metabolic disorders, e.g. gout or porphyria.
* Thrombo-embolic processes, e.g. pulmonary embolism or deep venous thrombosis.

Persistent fever which cannot be explained after repeated routine clinical inquiries, is called fever of unknown origin.

### Causes of Fever by Organ System

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Cardiovascular |

Vasculitis, Infective Endocarditis, Dressler's syndrome, Cholesterol Emboli Syndrome,

|

Chemical / poisoning |

2,4-Dinitrophenol, Abrin, Cadmium poisoning, Colchicine, Lithraea molleoides,

Dermatologic |

Weber-Christian disease, Toxic epidermal necrolysis, Scrofula, Necrotizing fasciitis, Furunculosis, Cellulitis, Carbuncle,

Drug Side Effect |

Abacavir , Abatacept , Acetaminophen, Acetazolamide , Acetohexamide , Acyclovir , Agalsidase beta, Adalimumab , Albendazole, Albuterol , Aldesleukin , Alefacept , Alemtuzumab, Alendronate , Alfuzosin , Alglucerase , Allopurinol, Altretamine , Aminopterin, Amitriptyline , Amobarbital, Amphotericin B, Anagrelide , Anakinra , Anastrozole , Ancrod, Anisindione , Aprepitant, Aripiprazole , Asparaginase , Atazanavir , Atorvastatin , Atovaquone , Atropine Ophthalmic , Auranofin , Aztreonam, Benazepril , Benztropine Mesylate , Bepridil , Bevacizumab , Bisphosphonate, Bleomycin, Bortezomib , Brinzolamide Ophthalmic , Bumetanide , Busulfan , Butabarbital , Butoconazole Vaginal Cream , Calcitriol , Candesartan , Capecitabine , Captopril , Carboplatin , Carisoprodol , Carmustine , Carteolol , Caspofungin, Cefaclor, Ceftazidime, Cephalosporin, Cetuximab , Chlorambucil , Chlordiazepoxide , Chlorothiazide , Chlorthalidone , Ciclosporin, Cidofovir , Cladribine , Clobazam, Clofarabine, Clonazepam , Clorazepate , Clotrimazole , Clozapine Cocaine, Colchicine, Colistimethate , Co-trimoxazole , Cyanocobalamin , Cyclobenzaprine , Cyclophosphamide, Cytarabine , Dacarbazine , Dactinomycin , Dalteparin Sodium , Dapsone, Daptomycin, Darbepoetin alfa, Darunavir , Daunorubicin , Decitabine, Deferasirox , Delavirdine , Desipramine , Dextroamphetamine and Amphetamine , Dextromethorphan, Diazepam , Diclofenac, Diethylpropion , Diflunisal , Diltiazem , Disopyramide , Dobutamine , Dolasetron , Donepezil , Dornase Alfa, Doxorubicin , Eculizumab, Efalizumab , Efavirenz , Emtricitabine , Enalapril , Enfuvirtide, Enoxaparin , Entacapone , Epinastine Ophthalmic , Epoetin Alfa , Eribulin, Erlotinib , Estazolam , Estradiol Topical , Etanercept , Ethosuximide , Etidronate , Etodolac , Etoposide, Ezetimibe , Famciclovir, Fenoprofen , Fipexide, Filgrastim , Flavoxate , Floxuridine , Flucytosine, Fludarabine Phosphate , Fluorouracil , Fluphenazine , Fluticasone and Salmeterol Inhalation , Fluvastatin , Fluvoxamine, Fosamprenavir , Foscarnet Sodium , Fosinopril , Furosemide , Gabapentin , Gatifloxacin , Gefitinib , Gemcitabine Hydrochloride , Glatiramer acetate, Glipizide , Glyburide , Goserelin , Granisetron , Grifulvin V, Guanethidine , Haloperidol, Heparin , Histrelin , Hydralazine , Hydrochlorothiazide , Ibandronate , Idarubicin , Ifosfamide , Imatinib , Imiglucerase , Imiquimod , Immune Globulin Intravenous , Indomethacin , Interferon gamma, Ipratropium and Albuterol Inhalation , Interferon Beta- 1A, Irinotecan hydrochloride, Isocarboxazid , Itraconazole , Lamivudine , Lenalidomide, Levalbuterol Inhalation , Levetiracetam , Levomepromazine, Linezolid, Liothyronine , Lisinopril , Lorazepam , Lovastatin , Loxapine , Mechlorethamine , Meclofenamate , Mefenamic acid, Melphalan , Meprobamate , Mercaptopurine,Meropenem, Methadone withdrawl, Methimazole , Methocarbamol , Methsuximide , Methyclothiazide , Methyldopa and Hydrochlorothiazide , Methylphenidate, Metolazone , Metoprolol, Metronidazole, Miconazole , Mifepristone, Minocycline, Mitomycin , Modafinil , Moexipril , Moricizine , Moxifloxacin ophthalmic , Nabumetone , Nafcillin Sodium , Nalmefene, Natalizumab , Nefazodone , Nilutamide , Nitrofurantoin , Nortriptyline , Olanzapine , Omalizumab, Ondansetron , Oprelvekin, Oseltamivir , Oxacillin Sodium , Oxaliplatin , Oxamniquine, Oxaprozin, Oxazepam , Oxcarbazepine , Paclitaxel, Palifermin , Paliperidone , Pamidronate , Panitumumab, Pantoprazole, Pegaspargase , Pegylated interferon alfa-2a, Pemetrexed , Penicillamine, Pentetic acid, Pentostatin , Perindopril , Phenazopyridine , Phenobarbital , Phenytoin , Pimecrolimus topical , Pimozide , Pindolol , Piroxicam , Plicamycin , Posaconazole , Pralatrexate,

Pravastatin , Prazepam , Praziquantel, Prazosin and polythiazide , Pregabalin , Primaquine , Primidone , Probenecid, Procainamide, Procarbazine , Prochlorperazine , Procyclidine , Potassium iodide, Propafenone , Propiomazine, Propylthiouracil , Protriptyline , permethrin, Pyrazinamide, Quetiapine , Quinapril , Ramipril , Ranitidine bismuth citrate , Rasagiline , Rasburicase, Ribavirin , Rifampicin, Riluzole , Risedronate , Risperidone , Rituximab , Rosuvastatin , Salsalate , Saquinavir , Sargramostim , Scopolamine, Secobarbital , Sibutramine, Silver sulfadiazine , Simvastatin , Sipuleucel-T, Sirolimus , Sodium oxybate , Solanine, Sorafenib, Spironolactone , Stool softeners , Streptomycin, Streptozocin , Strontium-89 chloride , Sulfadiazine , Sulfasalazine , Sulfinpyrazone , Sulfisoxazole , Sulindac , Sunitinib , Tamoxifen , Tamsulosin , Tanapox, Temazepam , Temozolomide , Teniposide , Terbinafine , Teriparatide (rDNA origin) , Testosterone Transdermal , Thiabendazole, Thioamide, Thioguanine , Thiotepa , Thyroid Medication , Ticarcillin Disodium , Ticlopidine , Tiludronate , Tiotropium Inhalation , Tipranavir , Tirofiban, Tocainide , Tolazamide , Tolbutamide , Topiramate, Topotecan Hydrochloride , Trandolapril , Tranylcypromine , Trastuzumab , Trazodone , Tretinoin, Triamterene, Triazolam , Trichothecene, Trihexyphenidyl , Trimethadione , Trimetrexate Glucuronate , Trimipramine , Troleandomycin , Valacyclovir , Valproate semisodium, Valproic Acid , Verapamil , Vinblastine , Vinorelbine Tartrate , Voriconazole, Vorinostat , Zalcitabine , Zanamivir, Zidovudine, Ziprasidone , Zoledronate, Zonisamide ,

Ear Nose Throat |

Sinusitis, Pharyngoconjunctival fever, Pharyngitis, Peritonsillar abscess, Otitis media, Orbital cellulitis, Mastoiditis, Ludwig's angina, Laryngitis, Gradenigo's syndrome, Dacryocystitis, Croup, Bezold's abscess,

Endocrine |

Subacute thyroiditis, Exopthalmos, Diabetes insipidus, De Quervain's thyroiditis, Adrenal hemorrhage,

Environmental |

Zinc oxide, Silicosis, Polytetrafluoroethylene, Metal fume fever,

Gastroenterologic |

Ulcerative colitis, Toxic megacolon, Pseudomembranous colitis/C.difficile, Peritonitis, Perianal abscess, Pancreatitis, Ischemic colitis, Intra-abdominal abscess, Ileitis, Hepato-biliary diseases, Gastritis, Gastroenteritis, Gastrointestinal perforation, Diverticulitis, Crohn's disease, Colitis, Cholangitis, Cholecystitis, Caroli's Disease, Caecitis, Appendicitis, Anal abscess,

Genetic |

Muckle-Wells syndrome, Sickle-cell disease, Krabbe disease, Hyperimmunoglobulinemia D with recurrent fever, Fabry's Disease, Cystic Fibrosis, Familial Mediterranian Fever, Blue diaper syndrome,

Hematologic |

Disseminated Intravascular Coagulation, Blood Transfusion, Acute lymphoblastic leukemia, Acute myeloid leukemia,

Iatrogenic |

Transfusion reaction, Transfusion-associated graft versus host disease, Serotonin syndrome, Malignant hyperthermia, Adjustable gastric band,

Infectious Disease |

Adenoviridae, African Hemmorhagic Fever, African horse sickness, African swine fever virus, African Trypanosomiasis, Alkhurma virus, Allergic bronchopulmonary aspergillosis, Alphavirus, Anthrax, Aphthovirus, Arbovirus, Arenavirus, Aripiprazole , Arterivirus, Aspergillosis, Astroviridae, Babanki virus, Bacillary angiomatosis, Bartonellosis, BK virus, Blackwater fever, Blastomycosis, Bordetella pertussis, Bornholm disease, Borrelia, Boutonneuse fever, Brucellosis, Bubonic plague, Buruli ulcer, Bwamba Fever, Cabin fever, Campylobacter jejuni, Cat scratch fever, Chagas disease, Chickenpox, Chlamydia, Chlamydophila pneumoniae, Clostridium Difficile, CMV , Coccidioidomycosis, Colorado tick fever virus, Cotton fever, Coxiella burnetii infection, Coxsackie A virus, Crimean Congo Hemorrhagic Fever, Cryptosporidiosis, Cyclosporiasis, Dengue Fever, Dientamoebiasis, Diphtheria, Ebola haemorrhagic fever, Echovirus, Enterotoxigenic Escherichia coli, Epstein-Barr virus, Fasciolosis, Fasciolopsiasis, Filoviridae, Flavivirus, Fusarium, Giardiasis, Gonorrhea, Group A streptococcal infection, Haemophilus influenzae, Haverhill fever, Hantavirus Pulmonary Syndrome, Herpangina, Hepatitis A, Hepatitis B, Hepatitis C, Hepatitis E, Herpes zoster, Herpesviridae, HIV/AIDS, Hookworm, Infectious mononucleosis, Influenza virus , Interferon gamma, Lassa Fever, Legionellosis, Leishmaniasis, Leptospirosis, Lemierre's Syndrome, Listeriosis, Lyme disease, Malaria, Measles, Melioidosis, Miliary tuberculosis, Mumps, Murray Valley encephalitis virus, Mycobacterium avium complex, Mycoplasma pneumoniae, Naegleria infection, Nocardiosis, Noma (disease), Norovirus infection, Omsk hemorrhagic fever, O'nyong'nyong virus, Opisthorchis infection, Oropouche virus, Paracoccidioidomycosis, Paragonimus Infection, Paratyphoid fever, Penicilliosis, Pityriasis rosea, Pneumocystis jirovecii pneumonia, Poliomyelitis, Pontiac fever, Pralatrexate, Psittacosis, Q fever, Rat-bite fever, Rhinovirus, Rheumatic fever, Rickettsial infections, Rift Valley fever virus, Rocky Mountain Spotted Fever, Roseola, Ross River Fever, Rotavirus, Rubella, Salmonella enteritidis, Salmonella typhi infection/ Typhoid fever, Scarlet fever, Schistosomiasis, Septic arthritis, Shigellosis, Severe acute respiratory syndrome, Sindbis virus, Sleeping sickness, Smallpox, Marburg hemorrhagic fever, Mediterranean spotted fever, Staphylococcal enteritis, Streptococcus pyogenes, Swine flu, Syphillis, TORCH infections, Toxic Shock Syndrome, Toxocara infection, Traveler's diarrhea, Trench Fever, Trichinosis, Tularemia, Varicella-zoster virus, Vibrio parahaemolyticus, Vibrio vulnificus, Visceral leishmaniasis, West Nile Virus, Whipple's disease, Yellow Fever Virus, Yersinia enterocolitica Infection (Yersiniosis), Yersinia Pestis Infection, Yersinia pseudotuberculosis, Zika fever,

Musculoskeletal / Ortho |

Septic arthritis, Reactive Polyarticular Arthritis,

Neurologic |

Subdural hygroma, Neuroleptic malignant syndrome, Meningitis, La Crosse encephalitis, Krabbe disease, Craniopharyngioma, Brain Abscess, Acute Disseminated Encephalomyelitis,

Nutritional / Metabolic |

Blue diaper syndrome, Gout, Porphyria

Obstetric/Gynecologic |

Pelvic inflammatory disease, Childbirth,

Oncologic |

Acute lymphoblastic leukemia, Acute myeloid leukemia, Pel-Ebstein fever, Synovial sarcoma, Renal Cell Carcinoma, Myxoma, Mesothelioma, Lung cancer, Juvenile Myelomonocytic Leukemia (JMML), Kaposi's sarcoma, Hodgkin's lymphoma, Craniopharyngioma, Chronic myelogenous leukemia,

Opthalmologic |

Tolosa-Hunt syndrome, Temporal arteritis, Cogan syndrome, Acute posterior multifocal placoid pigment epitheliopathy,

Overdose / Toxicity |

Vitamin A, Coley's Toxins, Didanosine , Ethchlorvynol, Ganciclovir , Melarsoprol, Methotrexate , Mycophenolate , Nevirapine , Oxybutynin , Oxycodone and aspirin , Peginterferon alfa-2a , Phenelzine , Phentermine, Selegiline , Solifenacin , Valganciclovir ,

Psychiatric | No underlying causes
Pulmonary |

Tuberculosis, Tracheitis, Pulmonary alveolar proteinosis, Pleurisy, Lung cancer, Lung abscess, Empyema, Community-acquired pneumonia, Bronchitis, Atelectasis, Alveolitis, Allergic bronchopulmonary aspergillosis, Acute Chest Syndrome,

Renal / Electrolyte |

Urinary tract infection, Pyelonephritis, Interstitial nephritis,

Rheum / Immune / Allergy |

Wegener Granulomatosis, Varicella (Chickenpox) Vaccine , Yellow Fever Vaccine , Takayasu's Arteritis, Systemic lupus erythematosus, Still's disease, Serum sickness, Sarcoidosis, Rheumatoid arthritis, Rabies vaccine , Polyarteritis nodosa, Lupoid hepatitis, Langerhans cell histiocytosis, Kawasaki disease, Hay fever, Churg-Strauss Syndrome, Bacillus Calmette-Guerin (BCG) Vaccine ,

Sexual |

Syphillis, Lymphogranuloma venereum,

Trauma | No underlying causes
Urologic |

Prostatitis,

Miscellaneous |

Retinoic acid syndrome, POEMS syndrome, Omphalitis, Occult abscess, Neutropenia, Mastitis, Lymphocytopenia, Kikuchi disease, Immune reconstitution inflammatory syndrome, Herxheimer reaction, Heroin withdrawl, Hemophagocytic lymphohistiocytosis, Fetal alcohol syndrome, Fat Embolism Syndrome, Cytokine release syndrome, Congenital syphilis, Cocaine, Adiposis dolorosa,

### Causes of Fever in Alphabetical Order

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[1] [2]

* 2,4-Dinitrophenol
* Abacavir
* Abatacept
* Abrin
* Acetazolamide
* Acetohexamide
* Acute Chest Syndrome
* Acute Disseminated Encephalomyelitis
* Acute lymphoblastic leukemia
* Acute myeloid leukemia
* Acute posterior multifocal placoid pigment epitheliopathy
* Acyclovir
* Adalimumab
* Adenoviridae
* Adiposis dolorosa
* Adjustable gastric band
* Adrenal hemorrhage
* African Hemmorhagic Fever
* African horse sickness
* African swine fever virus
* African Trypanosomiasis
* Albuterol
* Aldesleukin
* Alefacept
* Alemtuzumab
* Alendronate
* Alfuzosin
* Alglucerase
* Alkhurma virus
* Allergic bronchopulmonary aspergillosis
* Allopurinol
* Alphavirus
* Altretamine
* Alveolitis
* Aminopterin
* Amitriptyline
* Amobarbital
* Amphotericin B
* Anagrelide
* Anakinra
* Anal abscess
* Anastrozole
* Ancrod
* Anisindione
* Anthrax
* Aprepitant
* Aphthovirus
* Appendicitis
* Arbovirus
* Arenavirus
* Aripiprazole
* Arterivirus
* Asparaginase
* Aspergillosis
* Astroviridae
* Atazanavir
* Atelectasis
* Atorvastatin
* Atovaquone
* Atropine Ophthalmic
* Auranofin
* Aztreonam
* Babanki virus
* Babesiosis
* Bacillary angiomatosis
* Bacillus Calmette-Guerin (BCG) Vaccine
* Bacterial pneumonia
* Bartonellosis
* Benazepril
* Benztropine Mesylate
* Bepridil
* Bevacizumab
* Bezold's abscess
* Bisphosphonate
* BK virus
* Blackwater fever
* Blastomycosis
* Bleomycin
* Blood transfusion
* Blue diaper syndrome
* Bordetella pertussis
* Bornholm disease
* Borrelia
* Bortezomib
* Boutonneuse fever
* Brain Abscess
* Brinzolamide Ophthalmic
* Bronchitis
* Brucellosis
* Bubonic plague
* Bumetanide
* Buprenorphine
* Burkitt lymphoma
* Buruli ulcer
* Busulfan
* Butabarbital
* Butoconazole Vaginal Cream
* Bwamba Fever
* Cabin fever
* Cadmium poisoning
* Caecitis
* Calcitriol
* Campylobacter jejuni
* Candesartan
* Capecitabine
* Captopril
* Carboplatin
* Carbuncle
* Carisoprodol
* Carmustine
* Caroli's Disease
* Carteolol
* Caspofungin
* Cat scratch fever
* Cefaclor
* Ceftazidime
* Cellulitis
* Cephalosporin
* Cetuximab
* Chagas disease

* Chickenpox
* Childbirth
* Chlamydia
* Chlamydophila pneumoniae
* Chlorambucil
* Chlordiazepoxide
* Chlorothiazide
* Chlorthalidone
* Cholangitis
* Cholecystitis
* Cholesterol Emboli Syndrome
* Chronic myelogenous leukemia
* Churg-Strauss Syndrome
* Ciclosporin
* Cidofovir
* Cladribine
* Clofarabine
* Clonazepam
* Clorazepate
* Clostridium Difficile
* Clotrimazole
* CMV
* Cocaine
* Coccidioidomycosis
* Cogan syndrome
* Colchicine
* Coley's Toxins
* Colistimethate
* Colitis
* Colorado tick fever virus
* Community-acquired pneumonia
* Congenital syphilis
* Co-trimoxazole
* Cotton fever
* Coxiella burnetii infection
* Coxsackie A virus
* Craniopharyngioma
* Crimean Congo Hemorrhagic Fever
* Crohn's disease
* Croup
* Cryptosporidiosis
* Cyanocobalamin
* Cyclobenzaprine
* Cyclophosphamide
* Cyclosporiasis
* Cystic Fibrosis
* Cystitis, infective
* Cytarabine
* Cytokine release syndrome
* Dacarbazine
* Dacryocystitis
* Dactinomycin
* Dalteparin Sodium
* Dapsone
* Daptomycin
* Darbepoetin alfa
* Darunavir
* Daunorubicin
* De Quervain's thyroiditis
* Decitabine
* Deferasirox
* Delavirdine
* Dengue Fever
* Desipramine
* Dextroamphetamine and Amphetamine
* Dextromethorphan
* Diabetes insipidus
* Diazepam
* Diclofenac
* Didanosine
* Dientamoebiasis
* Diethylpropion
* Diflunisal
* Diltiazem
* Dimercaprol
* Dinoprostone
* Diphtheria
* Disopyramide
* Disseminated Intravascular Coagulation
* Diverticulitis
* Dobutamine
* Dolasetron
* Donepezil
* Doxorubicin
* Dressler's syndrome
* Ebola haemorrhagic fever
* Echovirus
* Eculizumab
* Efalizumab
* Efavirenz
* Empyema
* Emtricitabine
* Enalapril
* Enfuvirtide
* Enoxaparin
* Entacapone
* Enterotoxigenic Escherichia coli
* Epiglottitis
* Epinastine Ophthalmic
* Epoetin Alfa
* Epstein-Barr virus
* Eribulin
* Erlotinib
* Estazolam
* Estradiol Topical
* Etanercept
* Ethchlorvynol
* Ethosuximide
* Etidronate
* Etodolac
* Etoposide
* Exopthalmos
* Ezetimibe
* Fabry's Disease
* Famciclovir
* Familial Mediterranian Fever
* Fasciolopsiasis
* Fasciolosis

* Fat Embolism Syndrome
* Fenoprofen
* Fetal alcohol syndrome
* Filgrastim
* Filoviridae
* Fipexide
* Flavivirus
* Flavoxate
* Floxuridine
* Flucytosine
* Fludarabine Phosphate
* Fluorouracil
* Fluphenazine
* Fluticasone
* Fluticasone and Salmeterol Inhalation
* Fluvastatin
* Fluvoxamine
* Fosamprenavir
* Foscarnet Sodium
* Fosinopril
* Free-living amebic infection
* Furosemide
* Furunculosis
* Fusarium
* Gabapentin
* Gallbladder empyema
* Ganciclovir
* Gastritis
* Gastroenteritis
* Gastrointestinal perforation
* Gatifloxacin
* Gefitinib
* Gemcitabine Hydrochloride
* Giardiasis
* Glatiramer acetate
* Glipizide
* Glyburide
* Gonorrhea
* Goserelin
* Gout
* Gradenigo's syndrome
* Granisetron
* Grifulvin V
* Group A streptococcal infection
* Guanethidine
* Haemophilus influenzae serotype B infection
* Haloperidol
* Hamman-Rich Syndrome
* Hand-foot-mouth syndrome
* Hantavirus Pulmonary Syndrome
* Haverhill fever
* Hay fever
* Hemophagocytic lymphohistiocytosis
* Heparin
* Hepatitis A
* Hepatitis B
* Hepatitis E
* Hepato-biliary diseases
* Heroin withdrawl
* Herpangina
* Herpes zoster
* Herpesviridae
* Herxheimer reaction
* Hidradenitis suppurativa
* Histrelin
* HIV/AIDS
* Hodgkin's lymphoma
* Hookworm
* HPV Vaccine (Gardasil)
* Human monocytotropic ehrlichiosis
* Hydralazine
* Hydrochlorothiazide
* Hyperimmunoglobulinemia D with recurrent fever
* Ibandronate
* Idarubicin
* Idiopathic pulmonary haemosiderosis
* Ifosfamide
* Ileitis
* Imatinib
* Imiglucerase
* Imiquimod
* Immune Globulin Intravenous
* Immune reconstitution inflammatory syndrome
* Impetigo herpetiformis
* Indomethacin
* Infectious mononucleosis
* Infective Endocarditis
* Influenza virus
* Insulin lispro
* Interstitial nephritis
* Intra-abdominal abscess
* Ipratropium and Albuterol Inhalation
* Irinotecan hydrochloride
* Ischemic colitis
* Isocarboxazid
* Itraconazole
* Juvenile Myelomonocytic Leukemia (JMML)
* Kaposi's sarcoma
* Kawasaki disease
* Kikuchi disease
* Krabbe disease
* La Crosse encephalitis
* Lamivudine
* Langerhans cell histiocytosis
* Laryngitis
* Lassa Fever
* Legionellosis
* Leishmaniasis
* Lemierre's Syndrome
* Leptospirosis

* Levalbuterol Inhalation
* Levetiracetam
* Levomepromazine
* Linezolid
* Liothyronine
* Lisinopril
* Listeriosis
* Lithraea molleoides
* Lorazepam
* Lovastatin
* Loxapine
* Ludwig's angina
* Lung abscess
* Lung cancer
* Lupoid hepatitis
* Lyme disease
* Lymphocytopenia
* Lymphogranuloma venereum
* Macrophage activation syndrome
* Malakoplakia
* Malaria
* Malignant hyperthermia
* Marburg hemorrhagic fever
* Mastitis
* Mastocytosis
* Mastoiditis
* Measles
* Mechlorethamine
* Meclofenamate
* Mediastinitis
* Mefenamic acid
* Melarsoprol
* Melioidosis
* Melphalan
* Meningitis
* Meprobamate
* Mercaptopurine
* Mesothelioma
* Metal fume fever
* Methadone withdrawl
* Methimazole
* Methocarbamol
* Methotrexate
* Methsuximide
* Methyclothiazide
* Methyldopa and Hydrochlorothiazide
* Methylphenidate
* Metolazone
* Metoprolol
* Metronidazole
* Micafungin
* Miconazole
* Mifepristone
* Miliary tuberculosis
* Minocycline
* Mitomycin
* Modafinil
* Moexipril
* Moricizine
* Moxifloxacin ophthalmic
* Muckle-Wells syndrome
* Mumps
* Murray Valley encephalitis virus
* Mycobacterium avium complex
* Mycophenolate
* Mycoplasma pneumoniae
* Myxoma
* Nabumetone
* Naegleria infection
* Nafcillin Sodium
* Nalmefene
* Natalizumab
* Necrotizing fasciitis
* Nefazodone
* Nephroblastoma
* Neuroleptic malignant syndrome
* Neutropenia
* Nevirapine
* Nilutamide
* Nitrofurantoin
* Nocardiosis
* Noma (disease)
* Norovirus infection
* Nortriptyline
* Occult abscess
* Olanzapine
* Omphalitis
* Omsk hemorrhagic fever
* Ondansetron
* O'nyong'nyong virus
* Opisthorchis infection
* Oprelvekin
* Orbital cellulitis
* Oropouche virus
* Oseltamivir
* Otitis media
* Oxacillin Sodium
* Oxaliplatin
* Oxamniquine
* Oxaprozin
* Oxazepam
* Oxcarbazepine
* Oxybutynin
* Oxycodone and aspirin
* Paclitaxel
* Palifermin
* Paliperidone
* Pamidronate
* Pancreatitis
* Panitumumab
* Pantoprazole
* Paracoccidioidomycosis
* Paragonimus Infection
* Paratyphoid fever
* Pegaspargase
* Peginterferon alfa-2a
* Pegylated interferon alfa-2a
* Pel-Ebstein fever
* Pelvic inflammatory disease
* Pemetrexed
* Penicilliosis
* Penicillamine
* Pentetic acid

* Pentostatin
* Peplomycin
* Perianal abscess
* Pericoronitis
* Perindopril
* Peritonitis
* Peritonsillar abscess
* Puerperal pyrexia
* Pharyngitis
* Pharyngoconjunctival fever
* Phenazopyridine
* Phenelzine
* Phenobarbital
* Phentermine
* Phenytoin
* Pimecrolimus topical
* Pimozide
* Pindolol
* Piroxicam
* Pityriasis rosea
* Pleurisy
* Plicamycin
* Pneumococcal Vaccine 13-Valent (Prevnar 13)
* Pneumocystis jirovecii pneumonia
* POEMS syndrome
* Poliomyelitis
* Polyarteritis nodosa
* Polytetrafluoroethylene
* Pontiac fever
* Posaconazole
* Pravastatin
* Prazepam
* Praziquantel
* Prazosin and polythiazide
* Pregabalin
* Primaquine
* Primidone
* Probenecid
* Procainamide
* Procarbazine
* Prochlorperazine
* Procyclidine
* Propafenone
* Propiomazine
* Propylthiouracil
* Prostatitis
* Protriptyline
* Pseudomembranous colitis/C.difficile
* Psittacosis
* Pulmonary alveolar proteinosis
* Pyelonephritis
* Pyrazinamide
* Pyrexia of unknown origin
* Q fever
* Quetiapine
* Quinapril
* Rabies vaccine
* Ramipril
* Ranitidine bismuth citrate
* Rasagiline
* Rat-bite fever
* Reactive Polyarticular Arthritis
* Renal Cell Carcinoma
* Retinoic acid syndrome
* Rheumatic fever
* Rheumatoid arthritis
* Rhinovirus
* Ribavirin
* Rickettsial infections
* Rifampicin
* Rift Valley fever virus
* Riluzole
* Risedronate
* Risperidone
* Rituximab
* Rocky Mountain Spotted Fever
* Roseola
* Ross River Fever
* Rosuvastatin
* Rotavirus
* Rubella
* Salmonella enteritidis
* Salmonella typhi infection/ Typhoid fever
* Salsalate
* Saquinavir
* Sarcoidosis
* Sargramostim
* Scarlet fever
* Schistosomiasis
* Scopolamine
* Scrofula
* Secobarbital
* Selegiline
* Sennetsu fever
* Sepsis
* Septic arthritis
* Serotonin syndrome
* Serum sickness
* Severe acute respiratory syndrome
* Shigellosis
* Sibutramine
* Sickle-cell disease
* Silicosis
* Silver sulfadiazine
* Simvastatin
* Sindbis virus
* Sinusitis
* Sipuleucel-T
* Sirolimus
* Sleeping sickness
* Smallpox
* Sodium oxybate
* Sofosbuvir
* Solanine
* Solifenacin
* Sorafenib
* Spironolactone
* Spotted Fever
* Staphylococcal toxic shock syndrome
* Staphylococcal enteritis
* Still's disease
* Stool softeners

* Strep throat
* Streptococcus pyogenes
* Streptokinase
* Streptozocin
* Strontium-89 chloride
* Stuve-Wiedemann syndrome
* Subacute thyroiditis
* Subdural hygroma
* Succimer
* Sulfadiazine
* Sulfasalazine
* Sulfinpyrazone
* Sulfisoxazole
* Sulindac
* Sulprostone
* Sunitinib
* Swine flu
* Synovial sarcoma
* Syphillis
* Systemic lupus erythematosus
* Takayasu's Arteritis
* Tamoxifen
* Tamsulosin
* Tanapox
* Temazepam
* Temozolomide
* Temporal arteritis
* Tenofovir disoproxil fumarate
* Teniposide
* Terbinafine
* Teriparatide (rDNA origin)
* Testosterone Transdermal
* Thiabendazole
* Thioamide
* Thioguanine
* Thiotepa
* Thrombophlebitis
* Thyroid Medication
* Ticarcillin Disodium
* Ticlopidine
* Tiludronate
* Tiotropium Inhalation
* Tipranavir
* Tirofiban
* Tocainide
* Tolazamide
* Tolbutamide
* Tolosa-Hunt syndrome
* Topotecan Hydrochloride
* TORCH infections
* Toxic epidermal necrolysis
* Toxic megacolon
* Toxic Shock Syndrome
* Toxocara infection
* Tracheitis
* Trandolapril
* Transfusion reaction
* Transfusion-associated graft versus host disease
* Tranylcypromine
* Trastuzumab
* Traveler's diarrhea
* Trazodone
* Trench Fever
* Tretinoin
* Triamterene
* Triazolam
* Trichinosis
* Trichothecene
* Trihexyphenidyl
* Trimethadione
* Trimetrexate Glucuronate
* Trimipramine
* Troleandomycin
* Tropical pulmonary eosinophilia
* Tuberculosis
* Tularemia
* Ulcerative colitis
* Urate crystal arthropathy
* Urinary tract infection
* Valacyclovir
* Valganciclovir
* Valproate semisodium
* Valproic Acid
* Varicella (Chickenpox) Vaccine
* Varicella-zoster virus
* Vasculitis
* Verapamil
* Vibrio parahaemolyticus
* Vibrio vulnificus
* Vinblastine
* Vinorelbine Tartrate
* Viral Hepatitis A
* Viral Hepatitis C
* Viral infections
* Visceral leishmaniasis
* Vitamin A
* Voriconazole
* Vorinostat
* Weber-Christian disease
* Wegener Granulomatosis
* West Nile Virus
* Whipple's disease
* Yellow Fever Vaccine
* Yellow Fever Virus
* Yersinia enterocolitica Infection (Yersiniosis)
* Yersinia Pestis Infection
* Yersinia pseudotuberculosis
* Zalcitabine
* Zanamivir
* Zidovudine
* Zika fever
* Zinc oxide
* Ziprasidone
* Zoledronate
* Zonisamide

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## References

[edit | edit source]

1. ↑ Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:77 ISBN 1591032016
2. ↑ Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:68 ISBN 140510368X

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