| K-10 and/or Equivalents | Potassium Chloride | 
| K-Dur and/or Equivalents | Jamp-Potassium K-20, Potassium K-20 | 
| K-lyte and/or Equivalents | K-lyte | 
| Kaletra and/or Equivalents | Kaletra Pediatric, Kaletra | 
| Kayexalate and/or Equivalents | Kayexalate, Kayexalate Powder, Sodium Polystyrene Sulfonate Powder, Sodium Polystyrene Sulfonate Suspension | 
| Kazano and/or Equivalents | Nesina Met, Vipdomet | 
| Keflex and/or Equivalents | Cefalexin, Cephalexin, Keflex, Novo-Lexin, Apo-Cephalexin, Teva-Cephalexin | 
| Keflex Suspension and/or Equivalents | Cephalexin | 
| Kefzol Injection and/or Equivalents | Cefazolin Injection USP, Cefazolin Powder for Injection | 
| Kelocyanor and/or Equivalents | Dicobalt Edetate Injection | 
| Kemadrin and/or Equivalents | Procyclidine, Kemadrin, Pdp-Procyclidine | 
| Kemadrin Elixir and/or Equivalents | Procyclidine Elixir | 
| Kenacomb Cream and/or Equivalents | Triacomb, Viaderm-K.C., Viaderm-K.C. Cream, Viaderm-KC Cream | 
| Kenacomb Ointment and/or Equivalents | Viaderm-KC Ointment | 
| Kenalog in Orabase and/or Equivalents | Kenalog In Orabase, Triamcinolone Dental Paste | 
| Kenalog-10 and/or Equivalents | Kenalog 10 | 
| Kenalog-40 and/or Equivalents | Kenalog 40, Triamcinolone Acetonide Suspension Vial | 
| Keppra and/or Equivalents | Act-Levetiracetam, Keppra, Kevtam, Levetiracetam, Apo-Levetiracetam, Jamp-Levetiracetam | 
| Keppra Injection and/or Equivalents | Keppra Concentrate for Solution for Infusion | 
| Keppra Oral Solution and/or Equivalents | Keppra Oral Solution, Levetiracetam Oral Solution | 
| Keral and/or Equivalents | Keral | 
| Ketovite and/or Equivalents | Ketovite | 
| Kombiglyze and/or Equivalents | Kombiglyze XR | 
| Komboglyze and/or Equivalents | Komboglyze | 
| Konakion MM and/or Equivalents | Konakion MM |