- K-Citrate
- K-Dur
- K-Lyte
- Kaletra
- Kaletra Oral Solution
- Kaopectate
- Kaopectate Liquid Regular
- Kayexalate
- Kazano
- Keflex
- Kemadrin
- Kenacomb Cream
- Kenalog Injection
- Kenalog Ointment
- Kenalog Spray
- Keppra
- Keppra Liquid
- Keto-Diastix
- Keto-Diastix Reagent Strips
- Ketoconazole
- Ketoprofen
- Ketoprofen Gel
- Ketorolac
- Ketorolac Eye Drops
- Ketostix
- Ketotifen
- Kisqali
- Klaron
- Klomen
- Kombiglyze XR
- Kristalose
- Kwellada P Creme Rinse
- Kwellada-P Lotion
- Kytril
- Kytril Injection