- Ibandronate
- Ibandronic Acid
- Ibogaine
- Ibrexafungerp
- Ibrutinib
- Ibudilast
- Ibufenac
- Ibuprofen
- Ibutilide
- Icariin
- Icatibant
- Iclaprim
- Icotinib
- Idarubicin
- Idebenone
- Idelalisib
- Iditol
- Idobutal
- Ifosfamide
- Iguratimod
- Ilaprazole
- Illudin
- Iloperidone
- Iloprost
- Imatinib
- Imazamox
- Imazapyr
- Imazethapyr
- Imeglimin
- Imepitoin
- Imetit
- Imexine
- Imidacloprid
- Imidapril
- Imidazol
- Imidazole
- Imidocarb
- Imidocarb Dipropiona...
- Iminostilbene
- Imipenem
- Imipramine
- Imiprothrin
- Imiquimod
- Imrecoxib
- Inavolisib
- Indacaterol
- Indacaterol Maleate
- Indapamide
- Indaziflam
- Indazole
- Indicine
- Indigo
- Indigo Carmine
- Indigopurpurin
- Indigotindisulfonate
- Indinavir
- Indirubin
- Indobufen
- Indocyanine
- Indocyanine Green
- Indole
- Indoline
- Indoline Sulfonate
- Indolyl
- Indomethacin
- Indoramin
- Indoxacarb
- Infigratinib
- Ingavirin
- Inosine
- Inositol
- Inpyrfluxam
- Integerrimine
- Intermedine
- Intermedine Na
- Iobitridol
- Iodixanol
- Iodobenzene
- Iodobenzoic Acid
- Iodo-l-phenylalanine
- Iodophenyl
- Iodoresorcinol
- Iohexol
- Iomeprol
- Ionone
- Iopamidol
- Iopromide
- Iothalamic Acid
- Ioversol
- Ioxaglic Acid
- Ioxilan
- Ioxitalamic Acid
- Ipamorelin
- Ipconazole
- Ipomeanol
- Ipragliflozin
- Ipratropium
- Ipratropium Bromide
- Iprobenfos
- Iprodione
- Ipronidazole
- Iptacopan
- Irbesartan
- Irenzepine
- Irganox
- Iriflophenone
- Irinotecan
- Iron Saccharate
- Irsogladine
- Isatin
- Isatoic
- Isavuconazole
- Isavuconazonium
- Isavuconazonium Sulf...
- Isepamicin
- Isepamicin Sulfate
- Iso E Super
- Isoacteoside
- Isoamaranthin
- Isoamylol
- Isobergapten
- Isoboldine
- Isobutanol
- Isobutyric Acid
- Isocarbofos
- Isocarboxazid
- Isochroman
- Isocitric Acid
- Isocolumbin
- Isoconazole
- Isocorynantheidine
- Isocyanic Acid
- Isocycloseram
- Isodesmosine
- Isoemetine
- Isoeugenol
- Isofenphos
- Isoflavone
- Isoflurane
- Isoleucine
- Isomalt
- Isomaltitol
- Isomaltol
- Isomaltose
- Isomelezitose
- Isometamidium Chlori...
- Isometheptene
- Isoniazid
- Isoniazide
- Isonicotinate
- Isooctanoic Acid
- Isoorientin
- Isoparvifuran
- Isoperisone
- Isophorone
- Isophthalic Acid
- Isopimaric Acid
- Isoprenaline
- Isopropamide Iodide
- Isopropyl Alcohol
- Isopropyl Palmitate
- Isopropylmagnesium
- Isoproterenol
- Isopulegol
- Isopyridoxal
- Isoquinoline
- Isorhamnetin
- Isosilybin
- Isosorbide
- Isosorbide Dinitrate
- Isosorbide Mononitra...
- Isosulfan
- Isosulfan Blue
- Iso-sulfan Blue
- Isothiocyanate
- Isothipendyl
- Isotretinoin
- Isovalerate
- Isovaleric Acid
- Isovanillin
- Isoxaflutole
- Isoxsuprine
- Isradipine
- Istradefylline
- Itaconic Acid
- Itopride
- Itraconazole
- Ivabradine
- Ivacaftor
- Ivermectin
- Ivosidenib
- Ixabepilone
- Ixazomib
- Izuforant