| Polynucleotides (PDRN) | 100403-24-5 | Dermatics | 1 |
| Polyquaternium 51 | 25104-18-1 | | 1 |
| Polysaccharide Iron Complex (PIC) | 9004-66-4 | | 1 |
| Polysulfated Glycosaminoglycans | | | 1 |
| Polyvinylpolypyrrolidone (PVPP) | 25249-54-1 | | 1 |
| Polyvinylpyrrolidone | 9003-39-8 | | 1 |
| Ponazuril | 61477-40-5 | | 1 |
| Porcine Gelatin Tannate | 9000-70-8 | Antidiarrheals | 1 |
| Potassium DL-Aspartate Hemihydrate | | | 1 |
| Potassium chlorate | 3811-04-9 | Disinfectants | 1 |
| Potassium gluconate | 299-27-4 | Electrolytes | 1 |
| Potassium sulfate | 7778-80-5 | | 1 |
| Povidone C-12 | | Excipients | 1 |
| Povidone C-17 | | Excipients | 1 |
| Povidone C-30 | | Excipients | 1 |
| Povidone K-15 | | Excipients | 1 |
| Povidone K-29/32 | | Excipients | 1 |
| Pranoprofen | 52549-17-4 | Anti-inflammatory Agents | 1 |
| Prednisolone Sodium Metasulfobenzoate | 630-67-1 | | 1 |
| Prednisolone succinate | | Corticosteroids | 1 |
| Pregnenolone | 145-13-1 | | 1 |
| Pridinol | | Anticholinergics/Parasympathemimetics | 1 |
| Pridinol Hydrochloride | 511-45-5 | | 1 |
| Prilocaine Hydrochloride | 1786-81-8 | | 1 |
| Procaine Hydrochloride | 51-05-8 | | 1 |
| Procaterol | 72332-33-3 | Adrenergic agents | 1 |
| Procaterol Hydrochloride Hemihydrate | 81262-93-3 | | 1 |
| Promazine | 58-40-2 | Antipsychotics | 1 |
| Promestriene | 39219-28-8 | Genitourinary Agents | 1 |
| Propacetamol | 66532-85-2 | Analgesics | 1 |
| Propamidine Isetionate | 140-63-6 | Antimicrobial agents | 1 |
| Propantheline | 298-50-0 | Anticholinergics/Parasympathemimetics | 1 |
| Propinox Hydrochloride | 2765-97-1 | Antispasmodics | 1 |
| Propionamide | | Antituberculars | 1 |
| Propoxate | 7036-58-0 | | 1 |
| Propyl Gallate | 121-79-9 | | 1 |
| Propyl Parahydroxybenzoate | 94-13-3 | | 1 |
| Propyphenazone | 479-92-5 | Analgesics | 1 |
| Psilocybin | 520-52-5 | Central Nervous System Agents | 1 |
| Psyllium Seed | 90082-86-3 | | 1 |