| alpha-Glucosidases | Not Available | 0 | 0 | Details |
| alpha-Hydroxy Acid | Not Available | 1 | 0 | Details |
| alpha-Particle Emitting Activity | Not Available | 1 | 0 | Details |
| Alphaherpesvirinae | A subfamily of HERPESVIRIDAE characterized by a short replication cycle. The genera inc... more | 1 | 3 | Details |
| Aluminium Compounds | Inorganic compounds that contain aluminum as an integral part of the molecule. | 20 | 16 | Details |
| Aluminium derivatives | Not Available | 0 | 0 | Details |
| Aluminum and magnesium containing antacids | A group consisting of antacid agents that contain either aluminum, magnesium, or both. | 15 | 15 | Details |
| Aluminum Complex | Not Available | 1 | 4 | Details |
| Aluminum Oxides | An oxide of aluminum, occurring in nature as various minerals such as bauxite, corundum... more | 1 | 0 | Details |
| Aluminum Silicates | Any of the numerous types of clay which contain varying proportions of Al2O3 and SiO2. ... more | 4 | 0 | Details |
| Alveolar Surface Tension Reduction | Not Available | 3 | 0 | Details |
| Alzheimer Disease | Not Available | 1 | 0 | Details |
| Alzheimer Disease, drug therapy | Not Available | 4 | 1 | Details |
| Alzheimer's treatment, Arecoline derivatives | Not Available | 0 | 0 | Details |
| Amaryllidaceae Alkaloids | Alkaloids derived from TYRAMINE combined with 3,4-dihydroxybenzaldehyde via a norbellad... more | 1 | 7 | Details |
| Amebicides | Agents which are destructive to amebae, especially the parasitic species causing AMEBIA... more | 12 | 19 | Details |
| Amides | Organic compounds containing the -CO-NH2 radical. Amides are derived from acids by repl... more | 655 | 1927 | Details |
| Amidines | Derivatives of oxoacids RnE(=O)OH in which the hydroxy group is replaced by an amino gr... more | 60 | 159 | Details |
| Amidohydrolases | Biological catalysts and their cofactors. | 5 | 5 | Details |
| Amines | A group of compounds derived from ammonia by substituting organic radicals for the hydr... more | 611 | 2290 | Details |
| Amino Acid Hypertonic Solution | Not Available | 1 | 0 | Details |
| Amino Acids | Organic compounds that generally contain an amino (-NH2) and a carboxyl (-COOH) group. ... more | 336 | 1141 | Details |
| Amino Acids and Derivatives | Not Available | 7 | 68 | Details |
| Amino Acids, Acidic | Amino acids with side chains that are negatively charged at physiological pH. | 30 | 147 | Details |
| Amino Acids, Aromatic | Amino acids containing an aromatic side chain. | 55 | 176 | Details |