| Arteriolar Vasodilator | Not Available | 2 | 8 | Details |
| Arteriosclerosis | Not Available | 1 | 5 | Details |
| Arthritis, Rheumatoid, drug therapy | Not Available | 2 | 8 | Details |
| Arthropod Proteins | Proteins synthesized by organisms belonging to the phylum ARTHROPODA. Included in this ... more | 2 | 4 | Details |
| Arthropod Venoms | Venoms from animals of the phylum Arthropoda. Those most investigated are from scorpion... more | 5 | 7 | Details |
| Artificial Organs | Not Available | 0 | 0 | Details |
| Artificial Tears | Not Available | 7 | 18 | Details |
| Aryl Hydrocarbon Receptor Agonist | Not Available | 1 | 6 | Details |
| Aryloxyacetic Acid Derivatives | Not Available | 2 | 8 | Details |
| Arylpropionic acid NSAIDS | This category consists of NSAIDS that contain arylpropionic acids . They may be of par... more | 6 | 88 | Details |
| Arylsulfatases | Enzymes that catalyze the hydrolysis of a phenol sulfate to yield a phenol and sulfate.... more | 1 | 2 | Details |
| Arylsulfonates | Organic sulfonic acid esters or salts which contain an aromatic hydrocarbon radical. | 22 | 50 | Details |
| Arylsulfonic Acids | Organic sulfonic acid derivatives which contain an aromatic hydrocarbon radical. | 24 | 52 | Details |
| Asparagales | An order of monocotyledons plants in the superorder Lilianae of the class Magnoliopsida... more | 1 | 1 | Details |
| Asparaginase | Not Available | 3 | 5 | Details |
| Asparagine-specific Enzyme | Not Available | 4 | 7 | Details |
| Aspartate Aminotransferases, antagonists & inhibitors | Not Available | 1 | 1 | Details |
| Aspartic Acid Endopeptidases | A sub-subclass of endopeptidases that depend on an ASPARTIC ACID residue for their acti... more | 1 | 0 | Details |
| Aspartic Acid Proteases | A subclass of peptide hydrolases that depend on an ASPARTIC ACID residue for their acti... more | 1 | 0 | Details |
| Aspergillus derived antibiotics | Not Available | 0 | 0 | Details |
| Astatine | Not Available | 0 | 0 | Details |
| Asteraceae | A plant genus of the family ASTERACEAE. Members contain thiarubrine A and diterpenes. | 9 | 16 | Details |
| Asthma | Not Available | 1 | 4 | Details |
| Asthma, drug therapy | Not Available | 3 | 2 | Details |
| Astringents | Agents, usually topical, that cause the contraction of tissues for the control of bleed... more | 2 | 6 | Details |