| Piperazine and Derivatives | Not Available | 2 | 5 | Details |
| Piperazine Derivatives | Not Available | 8 | 29 | Details |
| Piperazines | Compounds that are derived from PIPERAZINE | 47 | 381 | Details |
| Piperidinedione Derivatives | Not Available | 3 | 5 | Details |
| Piperidines | A family of hexahydropyridines. | 93 | 342 | Details |
| Piperidones | Cyclic compounds that include atoms other than carbon in their ring structure. | 7 | 18 | Details |
| Piretanide and derivatives | Not Available | 0 | 0 | Details |
| Pituitary | Not Available | 4 | 16 | Details |
| Pituitary and Hypothalamic Hormones and Analogues | Not Available | 34 | 172 | Details |
| Pituitary Function | Not Available | 2 | 14 | Details |
| Pituitary Hormone Release Inhibiting Hormones | Polypeptide hormones produced in the hypothalamus which inhibit the release of pituitar... more | 10 | 19 | Details |
| Pituitary Hormone-Releasing Hormones | Peptides, natural or synthetic, that stimulate the release of PITUITARY HORMONES. They ... more | 16 | 19 | Details |
| Pituitary Hormones | Hormones secreted by the PITUITARY GLAND including those from the anterior lobe (adenoh... more | 34 | 74 | Details |
| Pituitary Hormones, Anterior | Hormones secreted by the adenohypophysis (PITUITARY GLAND, ANTERIOR). Structurally, the... more | 23 | 46 | Details |
| Pituitary Hormones, Posterior | A substance or extract from the neurohypophysis (PITUITARY GLAND, POSTERIOR). | 11 | 28 | Details |
| Placental Hormones | Hormones produced by the placenta include CHORIONIC GONADOTROPIN, and PLACENTAL LACTOGE... more | 1 | 1 | Details |
| Plant Extracts | Concentrated pharmaceutical preparations of plants obtained by removing active constitu... more | 56 | 93 | Details |
| Plant Exudates | Substances released by PLANTS such as PLANT GUMS and PLANT RESINS. | 12 | 5 | Details |
| Plant Growth Regulators | Any of the hormones produced naturally in plants and active in controlling growth and o... more | 5 | 4 | Details |
| Plant Gums | Polysaccharide gums from PLANTS. | 3 | 0 | Details |
| Plant Lectins | Protein or glycoprotein substances of plant origin that bind to sugar moieties in cell ... more | 3 | 0 | Details |
| Plant Oils | Oils derived from plants or plant products. | 30 | 12 | Details |
| Plant Preparations | Material prepared from plants. | 116 | 120 | Details |
| Plant Proteins | Proteins found in plants (flowers, herbs, shrubs, trees, etc.). The concept does not in... more | 4 | 0 | Details |
| Plantaginaceae | A plant family of order Lamiales. The Plantago genus is best known. Lesser known member... more | 1 | 0 | Details |