| Antidepressive Agents, Triazolopyridine | Not Available | 2 | 31 | Details |
| Antidepressive Agents, Tricyclic | Substances that contain a fused three-ring moiety and are used in the treatment of depr... more | 24 | 290 | Details |
| Antidiarrheal microorganisms | Not Available | 2 | 1 | Details |
| Antidiarrheals | Miscellaneous agents found useful in the symptomatic treatment of diarrhea. They have n... more | 17 | 49 | Details |
| Antidiarrheals, Intestinal Antiinflammatory/antiinfective Agents | Not Available | 46 | 234 | Details |
| Antidiuretic Agents | Agents that reduce the excretion of URINE, most notably the octapeptide VASOPRESSINS. | 3 | 15 | Details |
| Antidiuretic Hormone Receptor Antagonists | Endogenous compounds and drugs that inhibit or block the activity of ANTIDUIRETIC HORMO... more | 5 | 11 | Details |
| Antidote for Acetaminophen Overdose | Not Available | 1 | 15 | Details |
| Antidotes | Agents counteracting or neutralizing the action of POISONS. | 50 | 376 | Details |
| Antiemetic Serotonin 5-HT3 Receptor Antagonists | A class of antiemetic medications used to prevent nausea and vomiting among patients un... more | 5 | 35 | Details |
| Antiemetics | Drugs used to prevent NAUSEA or VOMITING. | 46 | 335 | Details |
| Antiemetics and Antinauseants | Not Available | 14 | 92 | Details |
| Antiemetics Antagonists | Not Available | 0 | 0 | Details |
| Antifibrillant agents with local anaesthetic activity | Not Available | 0 | 0 | Details |
| Antifibrinolytic Agents | Agents that prevent fibrinolysis or lysis of a blood clot or thrombus. Several endogeno... more | 10 | 50 | Details |
| Antifibrotic Agents | Not Available | 2 | 34 | Details |
| Antifoaming Agents | Agents used to prevent the formation of foam or to treat flatulence or bloat. | 6 | 7 | Details |
| Antifungal Agents | Antibiotics inhibiting the growth of or killing fungi and used in the treatment of vari... more | 90 | 397 | Details |
| Antifungal Agents (Vaginal) | Not Available | 8 | 58 | Details |
| Antifungals for Dermatological Use | Not Available | 50 | 182 | Details |
| Antifungals for Systemic Use | Antifungals which are used systemically, meaning they penetrate the circulatory system ... more | 3 | 17 | Details |
| Antifungals for Topical Use | Not Available | 49 | 181 | Details |
| Antigen Neutralization | Not Available | 1 | 11 | Details |
| Antigens | Substances that are recognized by the immune system and induce an immune reaction. | 63 | 65 | Details |
| Antigens, Bacterial | Substances elaborated by bacteria that have antigenic activity. | 14 | 21 | Details |