| Antihistamines for Topical Use | Not Available | 14 | 55 | Details |
| Antihyperlipidemics, clofibrate derivatives | Not Available | 0 | 0 | Details |
| Antihyperlipidemics, thyromimetic derivatives | Not Available | 0 | 0 | Details |
| Antihypertensive Agents | Drugs used in the treatment of acute or chronic vascular HYPERTENSION regardless of pha... more | 208 | 1185 | Details |
| Antihypertensive Agents Indicated for Hypertension | Included in this category are agents that have approved indications for the treatment o... more | 64 | 612 | Details |
| Antihypertensives for Pulmonary Arterial Hypertension | Not Available | 7 | 48 | Details |
| Antihypoglycemic Agent | Not Available | 2 | 4 | Details |
| Antiinfectives and Antiseptics for Local Oral Treatment | Not Available | 22 | 126 | Details |
| Antiinfectives for Systemic Use | Not Available | 404 | 2335 | Details |
| Antiinfectives for Treatment of Acne | Not Available | 7 | 54 | Details |
| Antiinflammatory and Antirheumatic Products | Not Available | 85 | 551 | Details |
| Antiinflammatory and Antirheumatic Products, Non-Steroids | Not Available | 75 | 507 | Details |
| Antiinflammatory Preparations, Non-Steroids for Topical Use | Not Available | 28 | 250 | Details |
| Antiinflammatory Products for Vaginal Administration | Not Available | 4 | 56 | Details |
| Antileishmanial | Not Available | 1 | 4 | Details |
| Antimalarial diaminopyrimidines | Not Available | 1 | 7 | Details |
| Antimalarial methanolquinolines | Not Available | 2 | 36 | Details |
| Antimalarials | Agents used in the treatment of malaria. They are usually classified on the basis of th... more | 36 | 433 | Details |
| Antimanic Agents | Agents that are used to treat bipolar disorders or mania associated with other affectiv... more | 7 | 109 | Details |
| Antimetabolite Immunosuppressant | Not Available | 2 | 36 | Details |
| Antimetabolites | Drugs that are chemically similar to naturally occurring metabolites, but differ enough... more | 73 | 466 | Details |
| Antimicrobial Cationic Peptides | Small cationic peptides that are an important component, in most species, of early inna... more | 5 | 13 | Details |
| Antimicrobial Peptides | Small peptides that play an important role in early innate and induced defenses against... more | 8 | 14 | Details |
| Antimicrobials, sulfonamides derivatives | Not Available | 0 | 0 | Details |
| Antimigraine Agents, Miscellaneous | Not Available | 3 | 60 | Details |