- K-Dur 10 (Potassium Chloride)
- K-Dur 20 (Potassium Chloride)
- K-Effervescent (Potassium Bicarbonate)
- K-Lor (Potassium Chloride)
- K-Lyte/Cl (Potassium Bicarbonate Potassium Chloride)
- K-Phos M.F. (Potassium Phosphate Sodium Phosphate)
- K-Phos Neutral (Potassium Phosphate Sodium Phosphate)
- K-vescent (Potassium Bicarbonate)
- K-Tan (Phenylephrine Pyrilamine)
- K-Phos No. 2 (Potassium Phosphate Sodium Phosphate)
- K-Tab (Potassium Chloride)
- Kadian (Morphine)
- Kalexate
- Kalbitor
- Kaletra (Lopinavir Ritonavir)
- Kanamycin
- Kao-Paverin (Loperamide)
- Kaon (Potassium Gluconate)
- Kao-Tin (Docusate)
- Kao-Tin Bismuth Subsalicylate Formula (Bismuth Subsalicylate)
- Kaon-CI (Potassium Chloride)
- Kaochlor S-F (Potassium Chloride)
- Kaon-CL 10 (Potassium Chloride)
- Kaon-CL 20% (Potassium Chloride)
- Kronofed-A-Jr (Chlorpheniramine Pseudoephedrine)
- Kunecatechins topical
- Ku-Zyme (Pancrelipase)
- Ku-Zyme HP (Pancrelipase)
- Kuric (Ketoconazole Topical)
- Kutrase (Pancrelipase)
- Kwelcof (Guaifenesin Hydr Ocodone)
- Kytril (Granisetron)
- Kuvan (Sapropterin)
- Kalixocin (clarithromycin) Drug
- Kalma (alprazolam) Drug
- Kaluril (amiloride hydrochloride) Drug
- Kapanol (Morphine Sulfate) Drug
- Karlor CD (cefaclor monohydrate sustained release tablets) Drug
- Karvea (irbesartan) Drug
- Karvezide (irbesartan & hydrochlorothiazide) Drug
- Keflex (cephalexin monohydrate) Drug
- Keflin (cefalotin sodium) Drug
- Keflor (cefaclor) Drug
- Keflor CD (cefaclor sustained release tablets) Drug
- Ketoral (Ketorolac trometamol) Drug
- Kevtam (levetiracetam) Drug
- Kinson (levodopa and carbidopa) Drug
- Kivexa (abacavir and lamivudine) Drug
- Klacid (Clarithromycin) Drug
- Konakion MM (phytomenadione) Drug
- Konakion MM Paediatric (phytomenadione) Drug
- Kripton (bromocriptine) Drug
- Kuvan (Sapropterin dihydrochloride) Drug
- Kytril Injection (granisetron) Drug
- Kytril Tablets (granisetron) Drug
