| Serotonin Receptor Agonists | Endogenous compounds and drugs that bind to and activate SEROTONIN RECEPTORS. Many sero... more | 61 | 585 | Details |
| Serotonin Receptor Antagonists | Drugs that bind to but do not activate serotonin receptors, thereby blocking the action... more | 150 | 1509 | Details |
| Serotonin receptor partial agonists | Not Available | 0 | 0 | Details |
| Serotonin-1b and Serotonin-1d Receptor Agonist | Not Available | 7 | 60 | Details |
| Serotonin-4 Receptor Agonist | Not Available | 2 | 15 | Details |
| Serotonin-4 Receptor Antagonist | Not Available | 0 | 0 | Details |
| Serpins | A family of serine proteinase inhibitors which are similar in amino acid sequence and m... more | 7 | 20 | Details |
| Serratia | Not Available | 1 | 1 | Details |
| Serum | The clear portion of BLOOD that is left after BLOOD COAGULATION to remove BLOOD CELLS a... more | 11 | 26 | Details |
| Serum Albumin | A major protein in the BLOOD. It is important in maintaining the colloidal osmotic pres... more | 4 | 8 | Details |
| Serum Globulins | All blood proteins except albumin ( = SERUM ALBUMIN, which is not a globulin) and FIBRI... more | 607 | 829 | Details |
| Sesquiterpenes | Fifteen-carbon compounds formed from three isoprenoid units with general formula C15H24. | 20 | 245 | Details |
| Sesquiterpenes, Eudesmane | SESQUITERPENES cyclized into two adjoining cyclohexane rings but with a different confi... more | 3 | 9 | Details |
| Severe Combined Immunodeficiency | Not Available | 1 | 2 | Details |
| Sex Hormones and Modulators of the Genital System | Not Available | 70 | 491 | Details |
| Shellfish Proteins | Not Available | 0 | 0 | Details |
| Shock, Septic | Not Available | 0 | 0 | Details |
| Short-Acting Antibacterial Sulfonamides | Not Available | 8 | 16 | Details |
| Sialic Acids | A group of naturally occurring N-and O-acyl derivatives of the deoxyamino sugar neurami... more | 3 | 10 | Details |
| Sialogogues | Agents which induce sialorrhea (i.e. the production of saliva). | 1 | 1 | Details |
| Siderophores | Low-molecular-weight compounds produced by microorganisms that aid in the transport and... more | 3 | 16 | Details |
| Sigma receptor ligands | Not Available | 0 | 0 | Details |
| Sigma-1 Agonist | Not Available | 1 | 27 | Details |
| Sigma-1 Receptor Agonists | Not Available | 1 | 27 | Details |
| Silicates | The generic term for salts derived from silica or the silicic acids. They contain silic... more | 7 | 11 | Details |