- K+Care ET
- K-10
- K-8
- K-C Suspension
- K-Dur
- K-Dur 20
- K-Lor
- K-Lyte CI
- K-Norm
- K-Pec
- K-Pek
- K-Pek II
- K-Sol
- K-Tab
- K-Tan
- Ka-Pec
- Ka-Pek
- Kabikinase
- Kadcyla
- Kadian
- Kalbitor
- Kaletra
- Kallidinogenase
- Kalydeco
- Kanamycin
- Kanjinti
- Kantrex
- Kanuma
- Kao-Paverin
- Kao-Pulgite
- Kao-Spen
- Kaochlor
- Kaochlor S-F
- Kaodene NN Suspension
- Kaolin
- Kaon
- Kaon-CI
- Kaopectate
- Kaopectate 1-D
- Kaopek
- Kapectolin
- Kapidex
- Kapvay
- Karbinal
- Karidium
- Kariva
- Katerzia
- Kato
- Kay Ciel
- Kazano
- Kcentra
- KCl-40
- Kebuzone
- Keep Alert
- Keepan
- Keflex
- Keflin
- Keftab
- Kefurox
- Kefzol
- Kelnor
- Kemadrin
- Kemstro
- Kenalog
- Kengreal
- Kepivance
- Keppra
- Keppra XR
- Kera-HC
- Kerafoam
- Keralac
- Keralyt
- Kerasal
- Keratol
- Keratol 40
- Keratol HC
- Kerlone
- Kerol
- Kerydin
- Kesimpta
- Kestrone 5
- Ketacine
- Ketaject
- Ketalar
- Ketamine
- Ketanserin
- Ketaset
- Ketathesia
- Ketaved
- Ketazolam
- Ketek
- Ketobemidone
- Ketobemidone And Antispasmodics
- Ketoconazole
- Ketodan
- Ketoprofen
- Ketoprofen, Combinations
- Ketorolac
- Ketotifen
- Kevzara
- Key-Pred
- Key-Pred SP
- Keystone
- Keystone Classic
- KG-Dal HD
- KG-Fed
- KG-Fed Expectorant
- KG-Hist D
- KG-Tuss HD
- KG-Tussin
- Kgs-hc
- Khedezla
- Kid's Choice
- Kids-Eeze Allergy
- Kids-Eeze Chest Relief
- Kids-Eeze Cough & Cold
- Kie
- Killitch
- Kimidess
- Kindest Kare Wash
- Kineret
- Kinevac
- Kinlytic
- Kinrix
- Kisqali
- Kitabis Pak
- Klaron
- KleerSight
- Klerist-D
- Klonopin
- KlonoPIN Wafer
- Klor Con M
- Klor-Con
- Klorvess
- Klotrix
- Koate DVI
- Kogenate FS
- Kolephrin
- Kolephrin DM
- Kolephrin GG/DM
- Kolorz
- Kombiglyze XR
- Konakion
- Kondremul Plain
- Kondremul with Phenolphtalein
- Konsyl Fiber
- Konyne 80
- Kophane
- Korlym
- Koselugo
- Kovaltry
- Kovanaze
- Kovia
- Krintafel
- Kristalose
- Kroger
- Kronofed-A
- krypton (81mKr) gas
- Krystexxa
- Ku-Zyme
- Kudrox
- Kuretek
- Kuric
- Kutkit Styps
- Kutrase
- Kuvan
- Kwelcof
- Kybella
- Kyleena
- Kymriah
- Kynamro
- Kynmobi
- Kyprolis
- Kytril