| Antibacterial monoclonal antibodies | Not Available | 4 | 2 | Details |
| Antibacterials for Systemic Use | Not Available | 230 | 911 | Details |
| Antibacterials, quinoline dioxide derivatives | Not Available | 0 | 0 | Details |
| Antibiotics for Pneumocystis Pneumonia | Antibiotic agents that may be used for the treatment of, or prophylaxis against, pneumo... more | 8 | 63 | Details |
| Antibiotics for Topical Use | Not Available | 16 | 109 | Details |
| Antibiotics, 6-aminopenicillanic acid derivatives | Not Available | 0 | 0 | Details |
| Antibiotics, Antineoplastic | Chemical substances, produced by microorganisms, inhibiting or preventing the prolifera... more | 36 | 175 | Details |
| Antibiotics, Antitubercular | Substances obtained from various species of microorganisms that are, alone or in combin... more | 10 | 86 | Details |
| Antibiotics, cefalosporanic acid derivatives | Not Available | 0 | 0 | Details |
| Antibiotics, oxacefalosporanic acid derivatives | Not Available | 0 | 0 | Details |
| Antibiotics, polyene derivatives | Not Available | 0 | 0 | Details |
| Antibodies | Immunoglobulin molecules having a specific amino acid sequence by virtue of which they ... more | 455 | 386 | Details |
| Antibodies, Anti-Idiotypic | Antibodies which react with the individual structural determinants (idiotopes) on the v... more | 0 | 0 | Details |
| Antibodies, Blocking | Not Available | 0 | 0 | Details |
| Antibodies, Monoclonal | Antibodies produced by a single clone of cells. | 386 | 332 | Details |
| Antibodies, Monoclonal, Humanized | Antibodies from non-human species whose protein sequences have been modified to make th... more | 192 | 210 | Details |
| Antibodies, Monoclonal, Murine-Derived | Antibodies obtained from a single clone of cells grown in mice or rats. | 2 | 6 | Details |
| Antibodies, Neutralizing | Antibodies that reduce or abolish some biological activity of a soluble antigen or infe... more | 9 | 1 | Details |
| Antibodies, Viral | Immunoglobulins produced in response to VIRAL ANTIGENS. | 1 | 1 | Details |
| Antibody-drug Conjugates | Not Available | 21 | 55 | Details |
| Antibody-Surface Protein Interactions | Not Available | 2 | 9 | Details |
| Anticarcinogenic Agents | Agents that reduce the frequency or rate of spontaneous or induced tumors independently... more | 24 | 147 | Details |
| Anticestodal Agents | Agents used to treat tapeworm infestations in man or animals. | 5 | 21 | Details |
| Anticestodals | Not Available | 3 | 3 | Details |
| Anticholesteremic Agents | Substances used to lower plasma CHOLESTEROL levels. | 25 | 165 | Details |