Prime
- ibandronate
- ibritumomab tiuxetan
- ibuprofen
- ibutilide
- Icar
- Idamycin
- idarubicin
- Ifex
- ifosfamide
- IG
- IGIM
- IG IV
- IL-2
- Iletin II Regular
- Ilosone
- Ilozyme
- imatinib
- Imdur
- imiglucerase
- imipenem/cilastatin
- imipramine
- imiquimod
- Imitrex
- immune globulin
- immune serum globulin
- Imodium
- Imodium A-D
- Imodium Advanced
- Impril
- Imuran
- inamrinone
- Inapsine
- Indameth
- indapamide
- Inderal
- Inderide 40/25
- Indian dye
- Indian paint
- Indian plant
- Indian Valerian
- indinavir
- Indochron E-R
- Indocid
- Indocin
- indomethacin
- InFeD
- Infergen
- infliximab
- influenza vaccine (nasal)
- Infumorph
- ingwer
- ingwerwurzel
- INH
- injectable contraceptive
- Innohep
- InnoPran XL
- Innovar
- Inocor
- Insomnal
- Inspra
- insulins
- Intal
- inteferon beta-1a
- Integrilin
- interferon alfacon-1
- interferon beta-1b
- interferon gamma-1b
- interferons, beta
- interleukin-2
- intermediate-acting corticosteroids
- intoxicating pepper
- Intralipid
- intrauterine contraceptive
- Intropin
- Invanz
- Invirase
- iodine, iodide
- Iodopen
- Iofed
- Iofed PD
- Ionamin
- ipratropium
- irbesartan
- Iressa
- irinotecan
- iron dextran
- iron polysaccharide
- iron sucrose
- iron supplements
- ISDN
- ISG
- Ismelin
- Ismo
- Iso-Bid
- Isonate
- isoniazid
- isoproterenol
- Isoptin
- Isopto Hyoscine
- Isorbid
- Isordil
- isosorbide
- isosorbide dinitrate
- isosorbide mononitrate
- Isotamine
- Isotrate
- Isotrate ER
- isotretinoin
- isradipine
- Isuprel
- itraconazole
- Iveegam