- K Effervescent tablet
- K-Lor Solution
- K-Pek II Tablets
- K-Phos
- K-Phos M.F.
- K-Phos Tablets
- K-Tab Extended-Release Tablets
- Kaletra
- Kalydeco
- Kantrex
- Kanuma
- Kao-Tin Softgels
- Kao-Tin Suspension
- Kaopectate
- Kapidex
- Kariva
- Kayexalate
- Kazano
- Kcentra
- Kelnor
- Kenalog Paste
- Kenalog Topical
- Kenalog-10
- Kengreal
- Kepivance
- Kepivance Solution for Injection
- Keppra
- Kerafoam Topical Emollient Foam
- Keralac
- Keralyt Gel
- Kerlone
- Kerydin
- Ketalar
- Ketek
- Keveyis
- Keytruda
- KGS HC
- Khedezla
- KI Oral Solution
- KidKare Pediatric Decongestant Drops
- Kineret
- Kinevac
- Kinrix
- Kionex
- Klaron
- KlonoPIN
- Kombiglyze XR
- Korlym
- Kovia Topical Ointment
- Kristalose Powder for Oral Solution
- Kruschen Salts
- Krystexxa
- Kuvan
- Kwell
- Kynamro
- Kyprolis
- Kytril