- ibalizumab, for HIV infection
- ibandronate, for osteoporosis
- IBD: see inflammatory bowel disease
- IBM (inclusion body myositis)
- ibritumomab, for follicular lymphoma
- ibrutinib, for CLL
- IBS (irritable bowel syndrome)
- ibuprofen
- ibutilide
- icatibant, for hereditary angioedema
- ICD: see implantable cardioverter defibrillator
- icosapent ethyl, for dyslipidemia
- ICP: see intracranial pressure
- ICSI (intracytoplasmic sperm injection)
- icterus: see jaundice
- ICU (intensive care unit), monitoring in
- ICU patient: see critically ill patient
- idarubicin, for AML
- idarucizumab
- idebenone, for ataxia
- idiopathic myelofibrosis
- idiopathic pulmonary fibrosis (IPF)
- idiopathic thrombocytopenic purpura (ITP)
- idoxuridine, for HSV infections
- ifosfamide, for cervical cancer
- IgA deficiency, isolated
- IgA nephropathy
- IgA vasculitis (Henoch-Schönlein purpura)
- IHD (intermittent hemodialysis)
- ILD: see interstitial lung disease
- ileal pouch-anal anastomosis
- ileoproctostomy
- iloperidone
- iloprost, for pulmonary hypertension
- imaging, diagnostic
- imatinib, for CML
- imidazoles, for dermatophyte infections
- imipenem
- imipenem-cilastatin, for sepsis/septic shock
- imipramine
- imiquimod
- immune-complex disorders
- immune-mediated myelopathy
- immune reconstitution inflammatory syndrome (IRIS)
- immunization
- immunocompromised host
- immunodeficiency disease
- immunoglobulin deficiency syndromes
- immunohemolytic anemia
- immunoproliferative small-intestinal disease (IPSID)
- immunosuppressive agents
- impetigo
- implantable cardioverter defibrillator (ICD)
- inactivated poliovirus vaccine (IPV)
- incidentaloma
- inclusion body myositis (IBM)
- indigestion
- indolent lymphoma
- indomethacin
- indomethacin-responsive headache
- inebilizumab, for neuromyelitis optica
- INF: see interferon entries
- infant botulism
- infections
- infectious mononucleosis
- infectious myelopathy
- infective endocarditis
- inferior vena cava filter
- infertility
- inflammation
- inflammatory bowel disease (IBD)
- infliximab
- influenza
- influenza vaccine
- innate immune system, deficiencies of
- insomnia
- insulinoma
- insulin resistance syndrome: see metabolic syndrome
- insulin secretagogues, for diabetes mellitus
- insulin therapy
- integrase inhibitors, for HIV infection
- intensive care unit (ICU), monitoring in
- intercostal neuritis
- interferon-alpha therapy
- interferon-beta therapy, for multiple sclerosis
- interferon therapy
- interleukin-2 therapy
- intermittent hemodialysis (IHD)
- internist, procedures commonly performed by
- interstitial cystitis
- interstitial lung disease (ILD)
- interstitial nephritis
- intestinal decompression
- intestinal hypermotility, paraneoplastic
- intestinal infections
- intestinal motility
- intestinal pseudoobstruction
- intimate partner violence (domestic violence)
- intraabdominal infections
- intra-arterial pressure monitoring
- intracerebral/intracranial hemorrhage
- intracranial (saccular) aneurysm
- intracranial aneurysm
- intracranial pressure (ICP)
- intracytoplasmic sperm injection (ICSI)
- intraperitoneal abscess
- intrauterine contraceptive device
- intrauterine insemination (IUI)
- intravascular device infections
- intravenous immunoglobulin (IVIg)
- invasive pulmonary aspergillosis
- in vitro fertilization (IVF)
- iodine deficiency
- iodine excess
- iodoquinol, for amebiasis
- IPF (idiopathic pulmonary fibrosis)
- ipilimumab, for melanoma
- ipratropium
- IPSID (immunoproliferative small-intestinal disease)
- IPV (inactivated poliovirus vaccine)
- irinotecan
- IRIS (immune reconstitution inflammatory syndrome)
- iris lesion
- iron
- iron-deficiency anemia
- irritable bowel syndrome (IBS)
- isavuconazole, for aspergillosis
- ischemic stroke
- islet-cell tumor
- isocarboxazid
- isolation techniques
- isometheptene, for migraine
- isoniazid
- isoproterenol, for tachyarrhythmias
- isosorbide dinitrate (ISDN)
- isosorbide mononitrate (ISMO), for chronic stable angina
- Isospora belli
- isotretinoin, for acne
- itch mite
- ITP (idiopathic thrombocytopenic purpura)
- itraconazole
- IUI (intrauterine insemination)
- ivabradine, for heart failure
- IV drug use, endocarditis and
- ivermectin
- IVF (in vitro fertilization)
- IVIg: see intravenous immunoglobulin
- ixazomib, for multiple myeloma
- ixekizumab
- Ixodes ticks