| Pentazocine Action Pathway |  | Drug action | ATP / Norepinephrine / Pentazocine / Dopamine / Potassium cation / Calcium |
| 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 |
| Perindopril Action Pathway |  | Drug action | Perindopril / Zinc |
| Phenbenzamine H1-Antihistamine Action |  | Drug action | Calcium |
| Phenindamine H1-Antihistamine Action |  | Drug action | Calcium / Phenindamine |
| Phenindione Action Pathway |  | Drug action | Phenindione / Phylloquinone / Calcium |
| Pheniramine H1-Antihistamine Action |  | Drug action | Calcium / Pheniramine |
| Phenprocoumon Action Pathway |  | Drug action | Phenprocoumon / Phylloquinone / Calcium |
| Phenylacetate Metabolism |  | Metabolic | L-Glutamine / Adenosine phosphate / ATP / Magnesium cation / Pyrophosphoric acid |
| Phenylalanine and Tyrosine Metabolism |  | Metabolic | Pyridoxal phosphate / Phenylalanine / Adenosine phosphate / Tyrosine / Glutamic acid / ATP / Calcium / Magnesium cation / Iron / Acetoacetic acid / Flavin adenine dinucleotide / Phenylpyruvic acid / Pyrophosphoric acid / Maleic acid / 4-Hydroxyphenylpyruvic acid / Homogentisic acid |
| Phenylbutazone Action Pathway |  | Drug action | Glutamic acid / Glutathione / Phenylbutazone / Dinoprostone / Calcium / Magnesium cation / Zinc / Prostaglandin D2 / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| Phenylketonuria |  | Disease | Pyridoxal phosphate / Phenylalanine / Adenosine phosphate / Tyrosine / Glutamic acid / ATP / Calcium / Magnesium cation / Iron / Acetoacetic acid / Flavin adenine dinucleotide / Phenylpyruvic acid / Pyrophosphoric acid / Maleic acid / 4-Hydroxyphenylpyruvic acid / Homogentisic acid |
| Phenyltoloxamine H1-Antihistamine Action |  | Drug action | Calcium / Phenyltoloxamine |
| Phenytoin (Antiarrhythmic) Action Pathway |  | Drug action | Ademetionine / ATP / Phenytoin / Potassium cation / Calcium / Magnesium cation / Mesoheme / Flavin adenine dinucleotide / Uridine-5'-Diphosphate |
| Phosphatidylcholine Biosynthesis |  | Metabolic | Ademetionine / Choline / ATP / Cytidine-5'-Triphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylcholine Biosynthesis PC(11D3/11D3) |  | Metabolic | Ademetionine / Choline / ATP / Cytidine-5'-Triphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylcholine Biosynthesis PC(11D3/11D5) |  | Metabolic | Ademetionine / Choline / ATP / Cytidine-5'-Triphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylcholine Biosynthesis PC(11D3/11M3) |  | Metabolic | Ademetionine / Choline / ATP / Cytidine-5'-Triphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylcholine Biosynthesis PC(11D3/11M5) |  | Metabolic | Ademetionine / Choline / ATP / Cytidine-5'-Triphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylcholine Biosynthesis PC(11D3/13D5) |  | Metabolic | Ademetionine / Choline / ATP / Cytidine-5'-Triphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylcholine Biosynthesis PC(11D3/13M5) |  | Metabolic | Ademetionine / Choline / ATP / Cytidine-5'-Triphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylcholine Biosynthesis PC(11D3/9D3) |  | Metabolic | Ademetionine / Choline / ATP / Cytidine-5'-Triphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylcholine Biosynthesis PC(11D3/9D5) |  | Metabolic | Ademetionine / Choline / ATP / Cytidine-5'-Triphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylcholine Biosynthesis PC(11D3/9M5) |  | Metabolic | Ademetionine / Choline / ATP / Cytidine-5'-Triphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium / Ethanolamine / Pyrophosphoric acid |
| Phosphatidylcholine Biosynthesis PC(11D5/11D3) |  | Metabolic | Ademetionine / Choline / ATP / Cytidine-5'-Triphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium / Ethanolamine / Pyrophosphoric acid |