| Paroxetine Mechanism of Action Action Pathway New |  | Drug Action | Pyridoxal phosphate / Tryptophan / Sapropterin / Paroxetine / Calcium / Iron / Oxitriptan |
| Paroxetine Predicted Metabolism Pathway |  | Metabolic | Paroxetine / Mesoheme |
| Patent Blue Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Patent Blue |
| Pazopanib Action Pathway |  | Drug Action | Calcium / Pazopanib |
| Pegaptanib Action Pathway |  | Drug Action | Calcium / Pegaptanib |
| Peginterferon alfa-2a Action Pathway |  | Drug Action | Peginterferon alfa-2a |
| Peginterferon alfa-2b Action Pathway |  | Drug Action | Peginterferon alfa-2b |
| Pemetrexed Action Pathway |  | Drug Action | Tetrahydrofolic acid / Glutamic acid / NADH / Folic acid / ATP / Pemetrexed / Magnesium cation / Formic acid / Deoxyuridine monophosphate |
| Pemigatinib Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Pemigatinib |
| Pemoline Drug Metabolism |  | Metabolic | Pemoline |
| Penbutolol Action Pathway |  | Drug Action | ATP / Potassium cation / Penbutolol / Calcium |
| Penbutolol Action Pathway (New) |  | Drug Action | ATP / Penbutolol / Calcium |
| Penbutolol Drug Metabolism |  | Metabolic | Penbutolol |
| Penciclovir Action Pathway |  | Drug Action | Penciclovir / Magnesium cation / Pyrophosphoric acid |
| Pentazocine Action Pathway |  | Drug Action | ATP / Norepinephrine / Pentazocine / Dopamine / Potassium cation / Calcium |
| Pentazocine Opioid Antagonist Action Pathway |  | Drug Action | ATP / Pentazocine / Calcium / Magnesium cation / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid |
| Pentobarbital Action Pathway |  | Drug Action | Pyridoxal phosphate / Glutamic acid / ATP / Pentobarbital / Calcium / Magnesium cation / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid |
| Pentobarbital Predicted Metabolism Pathway |  | Metabolic | Pentobarbital / Mesoheme |
| Pentosan polysulfate Drug Metabolism |  | Metabolic | Pentosan polysulfate |
| Pentose Phosphate Pathway |  | Metabolic | Adenosine phosphate / ATP / Magnesium cation / Iron / 5-O-phosphono-alpha-D-ribofuranosyl diphosphate / D-glyceraldehyde 3-phosphate / Ribose-1-Phosphate / Ribulose-5-Phosphate / Dihydroxyacetone phosphate / Gluconolactone |
| Pentostatin Drug Metabolism |  | Metabolic | Pentostatin |
| Peramivir Action Pathway |  | Drug Action | Calcium |
| Perampanel Drug Metabolism |  | Metabolic | Perampanel |
| Perflutren Metabolism |  | Metabolic | Perflutren |
| Pergolide Drug Metabolism |  | Metabolic | Pergolide |