| First Generation Antihistamines | Not Available | 1 | 9 | Details |
| First-Generation Cephalosporins | Not Available | 12 | 82 | Details |
| Fish Oils | Oils high in unsaturated fats extracted from the bodies of fish or fish parts, especial... more | 13 | 54 | Details |
| Fish Proteins, Dietary | Not Available | 0 | 0 | Details |
| Fixatives | Agents employed in the preparation of histologic or pathologic specimens for the purpos... more | 4 | 8 | Details |
| Flavanones | A group of FLAVONOIDS characterized with a 4-ketone. | 3 | 10 | Details |
| Flavins | Derivatives of the dimethylisoalloxazine (7,8-dimethylbenzo[g]pteridine-2,4(3H,10H)-dio... more | 6 | 151 | Details |
| Flavones | A group of 4-keto-FLAVONOIDS. | 7 | 41 | Details |
| Flavonoids | A group of phenyl benzopyrans named for having structures like FLAVONES. | 62 | 327 | Details |
| Flavonolignans | Heterodimers of FLAVONOIDS bound to LIGNANS. | 3 | 11 | Details |
| Flavonols | A group of 3-hydroxy-4-keto-FLAVONOIDS. | 8 | 71 | Details |
| Flavoring Agents | Substances added to foods and medicine to improve the quality of taste. | 19 | 95 | Details |
| Flocculation | Not Available | 1 | 0 | Details |
| Fluids and Secretions | Liquid substances produced by living organisms to fulfill specific functions or excrete... more | 8 | 14 | Details |
| Fluorenes | A family of diphenylenemethane derivatives. | 2 | 4 | Details |
| Fluoresceins | A family of spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one derivatives. These are used... more | 6 | 29 | Details |
| Fluorescent Dyes | Agents that emit light after excitation by light. The wave length of the emitted light ... more | 16 | 43 | Details |
| Fluorides | Inorganic salts of hydrofluoric acid, HF, in which the fluorine atom is in the -1 oxida... more | 5 | 9 | Details |
| Fluorine Compounds | Inorganic compounds that contain fluorine as an integral part of the molecule. | 8 | 12 | Details |
| Fluorine Radioisotopes | Not Available | 19 | 37 | Details |
| Fluorobenzenes | Derivatives of BENZENE that contain FLUORINE. | 1 | 15 | Details |
| Fluorocarbon Polymers | Compounds and molecular complexes that consist of very large numbers of atoms and are g... more | 0 | 0 | Details |
| Fluoropyrimidines | A type of antimetabolite used to treat cancer. | 5 | 47 | Details |
| Fluoroquinolone Antibacterial | Not Available | 6 | 76 | Details |
| Fluoroquinolones | A group of QUINOLONES with at least one fluorine atom and a piperazinyl group. | 41 | 262 | Details |