| Primaxin IV and/or Equivalents | Imipenem Cilastatin Vial USP, Imipenem Cilastin, Imipenem Cilastin USP | 
| Principen and/or Equivalents | Ampicillin, Novo-Ampicillin, Penbritin | 
| Pristiq and/or Equivalents | Pristiq | 
| Pro-Banthine and/or Equivalents | Pro-Banthine | 
| ProAir HFA and/or Equivalents | Airomir | 
| Proamatine and/or Equivalents | Gutron, Midodrine, Bramox | 
| Procardia XL and/or Equivalents | Adalat LA, Adalat Oros, Adalat XL, Adefin XL Modified Release, Mylan-Nifedipine Extended Release, Nifedipine XR, Nifedipine MR, Nifedipine XL | 
| Proctofoam-HC and/or Equivalents | Proctofoam-HC | 
| Proctosedyl Ointment and/or Equivalents | Dibucaine/Esculin/Framycetin/Hydrocortisone Ointment, Proctol | 
| Proctosedyl Suppository and/or Equivalents | Proctol Suppository | 
| Proflavine Cream and/or Equivalents | Proflavine Cream | 
| Progesterone IM in Oil and/or Equivalents | Gestone, Progesterone Injection | 
| Proglycem and/or Equivalents | Eudemine, Proglycem | 
| Proglycem Suspension and/or Equivalents | Proglycem Suspension | 
| Prograf and/or Equivalents | Prograf, Sandoz - Tacrolimus, Tacrolimus | 
| Prolensa Opht Solution and/or Equivalents | Prolensa Ophthalmic Solution | 
| Prolia and/or Equivalents | Prolia Prefilled Syringe | 
| Prolopa and/or Equivalents | Madopar, Madopar 12.5mg/50mg, Prolopa | 
| Prolopa CR and/or Equivalents | Madopar CR, Madopar HBS | 
| Prolopa Dispersible and/or Equivalents | Madopar Dispersible | 
| Proloprim and/or Equivalents | Trimethoprim | 
| Promacta and/or Equivalents | Revolade | 
| Prometrium and/or Equivalents | Progesterone, Prometrium, Teva - Progesterone, Utrogestan | 
| Pronestyl Injection and/or Equivalents | Procainamide, Sandoz Procainamide | 
| Propaderm Cream and/or Equivalents | Propaderm Cream |