| Porphyrias, Hepatic | Not Available | 1 | 2 | Details |
| Porphyrin Precursor | Not Available | 2 | 5 | Details |
| Porphyrinogens | Colorless reduced precursors of porphyrins in which the pyrrole rings are linked by met... more | 1 | 1 | Details |
| Porphyrins | A group of compounds containing the porphin structure, four pyrrole rings connected by ... more | 27 | 85 | Details |
| Positive inotropic agents, pimobendan derivatives | Not Available | 0 | 0 | Details |
| Positron Emitting Activity | Not Available | 10 | 25 | Details |
| Posterior Pituitary Lobe Hormones | Not Available | 7 | 23 | Details |
| Potassium Binder | Not Available | 3 | 5 | Details |
| Potassium Channel Blockers | A class of drugs that act by inhibition of potassium efflux through cell membranes. Blo... more | 9 | 104 | Details |
| Potassium Channel Opener | Not Available | 5 | 26 | Details |
| Potassium Channels, agonists | Not Available | 1 | 3 | Details |
| Potassium Compounds | Inorganic compounds that contain potassium as an integral part of the molecule. | 4 | 15 | Details |
| Potassium Ion Binding Activity | Not Available | 1 | 1 | Details |
| Potassium Ion Exchange Activity | Not Available | 1 | 3 | Details |
| Potassium Salt | Not Available | 22 | 47 | Details |
| Potassium-competitive Acid Blockers | Not Available | 1 | 12 | Details |
| Potassium-removing Agents | Not Available | 3 | 5 | Details |
| Potassium-Sparing Diuretics | A subclass of diuretics that limits the secretion of POTASSIUM into the URINE. | 6 | 45 | Details |
| Potential QTc-Prolonging Agents | Agents associated with a possible risk of QTc prolongation. | 191 | 1744 | Details |
| Poultry Proteins | Not Available | 0 | 0 | Details |
| PPAR alpha | Not Available | 0 | 0 | Details |
| PPAR alpha, agonists | Not Available | 4 | 34 | Details |
| PPAR alpha, antagonists & inhibitors | Not Available | 1 | 2 | Details |
| PPAR delta, agonists | Not Available | 3 | 25 | Details |
| PPAR delta, antagonists & inhibitors | Not Available | 1 | 1 | Details |