| Angiotensin II, antagonists & inhibitors | Not Available | 1 | 1 | Details |
| Angiotensin Receptor Antagonists | Agents that antagonize ANGIOTENSIN RECEPTORS. Many drugs in this class specifically tar... more | 14 | 72 | Details |
| Angiotensin-Converting Enzyme Inhibitors | A class of drugs whose main indications are the treatment of hypertension and heart fai... more | 29 | 69 | Details |
| Angiotensins | Oligopeptides which are important in the regulation of blood pressure (VASOCONSTRICTION... more | 5 | 1 | Details |
| Anilides | Any aromatic amide obtained by acylation of aniline. | 29 | 129 | Details |
| Aniline Compounds | Compounds that include the aminobenzene structure. | 111 | 267 | Details |
| Anilino-nicotinic acid derivatives | Not Available | 0 | 0 | Details |
| Animal Proteins, Dietary | DIETARY PROTEINS derived from ANIMALS. | 5 | 0 | Details |
| Anion Exchange Resins | High-molecular-weight insoluble polymers that contain functional cationic groups capabl... more | 2 | 2 | Details |
| Anion Transport Proteins | Membrane proteins whose primary function is to facilitate the transport of negatively c... more | 0 | 0 | Details |
| Anions | Negatively charged atoms, radicals or groups of atoms which travel to the anode or posi... more | 126 | 243 | Details |
| Anisoles | A group of compounds that are derivatives of methoxybenzene and contain the general for... more | 1 | 0 | Details |
| Anorexigenic Agents & Respiratory and Cerebral Stimulants, Miscellaneous | Not Available | 1 | 4 | Details |
| Anorexigenic Agents & Respiratory and CNS Stimulants | Not Available | 3 | 28 | Details |
| Ant Venoms | Not Available | 0 | 0 | Details |
| Antacids | Substances that counteract or neutralize acidity of the GASTROINTESTINAL TRACT. | 19 | 21 | Details |
| Antacids and Adsorbents | Not Available | 9 | 33 | Details |
| Antacids With Antiflatulents | Not Available | 1 | 0 | Details |
| Anterior Pituitary Lobe Hormones and Analogues | Not Available | 10 | 37 | Details |
| Anthelmintics | Agents destructive to parasitic worms. They are used therapeutically in the treatment o... more | 47 | 93 | Details |
| Anthracenes | Anthracenes with one ketone group. | 14 | 57 | Details |
| Anthracycline Topoisomerase Inhibitor | Not Available | 5 | 61 | Details |
| Anthracyclines | Organic compounds that have a tetrahydronaphthacenedione ring structure attached by a g... more | 18 | 67 | Details |
| Anthracyclines and Related Substances | Not Available | 11 | 74 | Details |
| Anthraquinones | Compounds based on ANTHRACENES which contain two KETONES in any position. Substitutions... more | 5 | 14 | Details |