| Acifluorfen | 50594-66-6 | Enzyme Replacements/modifiers | 0 |
| Acimtamig | 2738880-26-5 | Other substances | 0 |
| Acipimox | 51037-30-0 | Lipid-lowering agents | 0 |
| Aclarubicin | 57576-44-0 | Antibacterials | 0 |
| Aclerastide | 227803-63-6 | Hormonal Agents | 0 |
| Aclimostat | 2082752-83-6 | Anti-diabetics | 0 |
| Acolbifene | 182167-02-8 | | 0 |
| Aconiazide | 13410-86-1 | Anti-infective Agents | 0 |
| Acoramidis | 1446711-81-4 | | 0 |
| Acotiamide | 185106-16-5 | Enzyme Replacements/modifiers | 0 |
| Acoziborole | 1266084-51-8 | | 0 |
| Acridine Carboxamide | 89459-25-6 | Enzyme Replacements/modifiers | 0 |
| Acriflavine | 65589-70-0 | Anti-infective Agents | 0 |
| Acrizanib | 1229453-99-9 | Enzyme Replacements/modifiers | 0 |
| Acrylic Acid | 79-10-7 | | 0 |
| Acteoside | 61276-17-3 | Anti-infective Agents | 0 |
| Actinium | 7440-34-8 | Anticancer drugs | 0 |
| Actoxumab | 1245634-25-6 | Antibacterials | 0 |
| Acumapimod | 836683-15-9 | Enzyme Replacements/modifiers | 0 |
| Acyline | 170157-13-8 | Hormonal Agents | 0 |
| Adafosbuvir | 1613589-09-5 | Anti-infective Agents | 0 |
| Adagloxad simolenin | 1458687-85-8 | | 0 |
| Adavosertib | 955365-80-7 | Anticancer drugs | 0 |
| Added 18 march | 18-03-2024 | | 0 |
| Adebrelimab | 2247114-85-6 | Other substances | 0 |
| Adecatumumab | 503605-66-1 | Other substances | 0 |
| Adefovir | 106941-25-7 | Anti-infective Agents | 0 |
| Adegramotide | 1252802-98-4 | | 0 |
| Adelmidrol | 1675-66-7 | | 0 |
| Adenosine Phosphonoacetic Acid | | | 0 |
| Adenylosuccinic Acid | 19046-78-7 | | 0 |
| Adinazolam | 37115-32-5 | | 0 |
| Adiphenine | 64-95-9 | | 0 |
| Adipiplon | 840486-93-3 | Anti-anxiety | 0 |
| Adlinacogene civaparvovec | 2143579-02-4 | | 0 |
| Adomeglivant | 1488363-78-5 | Other substances | 0 |
| Adrabetadex | 128446-35-5 | | 0 |
| Adrenalone | 99-45-6 | Dental and Oral Agents | 0 |
| Adriforant | 943057-12-3 | | 0 |
| Aducanumab | 1384260-65-4 | Other substances | 0 |