| One Touch Verio Test Strips and/or Equivalents | One Touch Verio Strip | 
| One Touch Vita Test Strips and/or Equivalents | One Touch Vita Test Strips | 
| One-Alpha and/or Equivalents | Alfacalcidol, One-Alpha | 
| One-Alpha Injection and/or Equivalents | One-Alpha Ampoules | 
| Onglyza and/or Equivalents | Onglyza | 
| OptiChamber and/or Equivalents | OptiChamber Diamond | 
| Optivar and/or Equivalents | Optilast | 
| Optrex Allergy w/v Eye Drops and/or Equivalents | Optrex Allergy Eye Drops, Optrex Allergy w/v Eye Drops | 
| Optrex Eye Drops and/or Equivalents | Optrex Bloodshot Eye Drops, Optrex Sore Eye Drops | 
| Optrex Hayfever Relief w/v Eye Drops and/or Equivalents | Optrex Hayfever Eye Drops, Optrex Hayfever Relief w/v Eye Drops | 
| Optrex itchy Eyes Drops and/or Equivalents | Optrex Itchy Eyes Drops | 
| Optrex Sore Eye Relief Drops and/or Equivalents | Optrex Sore Eye Relief Drops | 
| Orabase Paste and/or Equivalents | Orabase Paste | 
| Oracea and/or Equivalents | Apprilon | 
| Oralair and/or Equivalents | Oralair 100IR, Oralair 300IR | 
| Orap and/or Equivalents | Pimozide, Orap | 
| Orbenin and/or Equivalents | Cloxacillin, Novo-Cloxacillin, Novo-Cloxin | 
| Orinase and/or Equivalents | Tolbutamide | 
| Ornidazole and/or Equivalents | Ornidazole | 
| Ortho 0.5/35 and/or Equivalents | Ortho 0.5/35 | 
| Ortho Cyclen and/or Equivalents | Cilest, Cyclen 21, Cyclen 28 | 
| Ortho Tri-Cyclen and/or Equivalents | Tri-Cyclen 21 Discreet, Tri-Cyclen 28 Discreet | 
| Ortho Tri-Cyclen Lo and/or Equivalents | Apo-Tricira Lo 21, Apo-Tricira Lo 28, Tri-Cyclen Lo 21, Tri-Cyclen Lo 28, Tricira Lo 21, Tricira Lo 28 | 
| Ortho-Evra and/or Equivalents | Evra, Evra Patch | 
| Ortho-Novum 1/50 (21 Day) and/or Equivalents | Norinyl 1 |