| Fruit Proteins | Not Available | 0 | 0 | Details |
| Fumarates | Compounds based on fumaric acid. | 2 | 4 | Details |
| Fungal Proteins | Not Available | 2 | 0 | Details |
| Fungi | Multicellular fungi that are commonly referred to as molds, containing branching tubula... more | 1 | 0 | Details |
| Fungicides, Industrial | Chemicals that kill or inhibit the growth of fungi in agricultural applications, on woo... more | 8 | 20 | Details |
| Fur | Not Available | 0 | 0 | Details |
| Furans | Compounds with a 5-membered ring of four carbons and an oxygen. They are aromatic heter... more | 28 | 66 | Details |
| Furin, antagonists & inhibitors | Not Available | 1 | 1 | Details |
| Furocoumarins | Angular forms of furocoumarins. | 6 | 15 | Details |
| Fused-Ring Compounds | Polycyclic compounds with adjacent rings that share the same two adjacent atoms. | 406 | 1953 | Details |
| Fusion Protein Inhibitors | Not Available | 2 | 13 | Details |
| GABA Agents | Substances used for their pharmacological actions on GABAergic systems. GABAergic agent... more | 65 | 501 | Details |
| GABA Agonists | Endogenous compounds and drugs that bind to and activate GAMMA-AMINOBUTYRIC ACID recept... more | 14 | 63 | Details |
| GABA Antagonists | Drugs that bind to but do not activate GABA RECEPTORS, thereby blocking the actions of ... more | 6 | 67 | Details |
| GABA Modulators | Substances that do not act as agonists or antagonists but do affect the GAMMA-AMINOBUTY... more | 42 | 323 | Details |
| GABA Uptake Inhibitors | Compounds that suppress or block the plasma membrane transport of GAMMA-AMINOBUTYRIC AC... more | 1 | 3 | Details |
| GABA-A Receptor Agonists | Endogenous compounds and drugs that bind to and activate GABA-A RECEPTORS. | 7 | 45 | Details |
| GABA-A Receptor Antagonists | Drugs that bind to but do not activate GABA-A RECEPTORS thereby blocking the actions of... more | 3 | 13 | Details |
| GABA-B Receptor Agonists | Endogenous compounds and drugs that bind to and activate GABA-B RECEPTORS. | 2 | 7 | Details |
| Gaba-derivative Skeletal Muscle Relaxants | Not Available | 1 | 3 | Details |
| Gabapentin and Prodrugs | This category is used to create drug-drug interactions. | 2 | 15 | Details |
| Gabapentinoids | Not Available | 3 | 15 | Details |
| Gadolinium-based Contrast Agent | Not Available | 9 | 17 | Details |
| Galactitol | A naturally occurring product of plants obtained following reduction of GALACTOSE. It a... more | 2 | 1 | Details |
| Galactosamine | Cyclic compounds that include atoms other than carbon in their ring structure. | 1 | 2 | Details |