| Angiotensin II receptor blockers (ARBs), plain | Not Available | 10 | 65 | Details |
| Angiotensin II Type 1 Receptor Blockers | Agents that antagonize ANGIOTENSIN II TYPE 1 RECEPTOR. Included are ANGIOTENSIN II anal... more | 11 | 54 | Details |
| Angiotensin II Type 2 Receptor Blockers | Agents that antagonize the ANGIOTENSIN II TYPE 2 RECEPTOR. | 5 | 46 | Details |
| Angiotensin II, antagonists & inhibitors | Not Available | 1 | 2 | Details |
| Angiotensin Receptor Antagonists | Agents that antagonize ANGIOTENSIN RECEPTORS. Many drugs in this class specifically tar... more | 18 | 89 | Details |
| Angiotensin-Converting Enzyme Inhibitors | A class of drugs whose main indications are the treatment of hypertension and heart fai... more | 32 | 94 | Details |
| Angiotensins | Oligopeptides which are important in the regulation of blood pressure (VASOCONSTRICTION... more | 5 | 9 | Details |
| Anhydrides | Chemical compounds derived from acids by the elimination of a molecule of water. | 1 | 2 | Details |
| Anilides | Any aromatic amide obtained by acylation of aniline. | 44 | 173 | Details |
| Aniline Compounds | Compounds that include the aminobenzene structure. | 141 | 418 | Details |
| Anilino-nicotinic acid derivatives | Not Available | 0 | 0 | Details |
| Animal Proteins, Dietary | DIETARY PROTEINS derived from ANIMALS. | 6 | 2 | Details |
| Anion Exchange Resins | High-molecular-weight insoluble polymers that contain functional cationic groups capabl... more | 3 | 4 | Details |
| Anion Transport Proteins | Membrane proteins whose primary function is to facilitate the transport of negatively c... more | 1 | 0 | Details |
| Anions | Negatively charged atoms, radicals or groups of atoms which travel to the anode or posi... more | 140 | 403 | Details |
| Anisoles | A group of compounds that are derivatives of methoxybenzene and contain the general for... more | 1 | 1 | Details |
| Annexin A5 | Not Available | 0 | 0 | Details |
| Annexins | Family of calcium- and phospholipid-binding proteins which are structurally related and... more | 0 | 0 | Details |
| Anorexigenic Agents & Respiratory and Cerebral Stimulants, Miscellaneous | Not Available | 1 | 4 | Details |
| Anorexigenic Agents & Respiratory and CNS Stimulants | Not Available | 3 | 30 | Details |
| Ant Venoms | Not Available | 0 | 0 | Details |
| Antacids | Substances that counteract or neutralize acidity of the GASTROINTESTINAL TRACT. | 20 | 43 | Details |
| Antacids and Adsorbents | Not Available | 9 | 43 | Details |
| Antacids With Antiflatulents | Not Available | 1 | 1 | Details |
| Anterior Pituitary Lobe Hormones and Analogues | Not Available | 13 | 51 | Details |