| Ortho-Novum 1/35 and/or Equivalents | Ortho 1/35, Ortho 1/35 Discreet | 
| Ortho-Novum 7/7/7 and/or Equivalents | Ortho 7/7/7, Ortho 7/7/7 Discreet | 
| Orthovisc Syringe and/or Equivalents | Orthovisc Syringe | 
| Orudis and/or Equivalents | Ketoprofen, Ketoprofen-E | 
| Oruvail CR and/or Equivalents | Oruvail CR, Ketoprofen SR, Oruvail SR | 
| Oruvail Gel and/or Equivalents | Oruvail Gel | 
| Ospolot and/or Equivalents | Ospolot | 
| Ostoforte and/or Equivalents | Ergocalciferol | 
| Osvaren and/or Equivalents | Osvaren | 
| Otezla and/or Equivalents | Otezla | 
| Otixal Otic Ear Drop Vials and/or Equivalents | Otixal Otic Ear Drop Vials 0.25 ml | 
| Otomax Ointment and/or Equivalents | Otomax | 
| Ovestin HRT Cream and Applicator and/or Equivalents | Ovestin Cream, Ovestin HRT Cream and Applicator | 
| Oxeze Turbuhaler and/or Equivalents | Oxeze Turbuhaler, Oxis Turbuhaler | 
| Oxybuprocaine HCL and/or Equivalents | Minims Oxybuprocaine HCL | 
| Oxytrol and/or Equivalents | Oxytrol |