| 9,10-Dihydrolysergic acid | 5878-43-3 | Central Nervous System Agents | 1 |
| 9-Oxo-10(9H)-acridineacetic acid | 38609-97-1 | | 1 |
| Abatacept | 332348-12-6 | | 1 |
| Abciximab | 143653-53-6 | Glycoprotein IIb/IIIa receptor antagonists | 1 |
| Abrocitnib | 1802446-37-1 | Protein kinase inhibitors | 1 |
| Acalabrutinib | 1420477-60-6 | | 1 |
| Acebrophylline | 96989-76-3 | Bronchodilators | 1 |
| Acebutolol HCl | 34381-68-5 | Beta blockers | 1 |
| Acefylline | 652-37-9 | Bronchodilators | 1 |
| Acemetacin | 53164-05-9 | Antihypertensive agents | 1 |
| Acetamide | 60-35-5 | Detoxifiers in oncolytics | 1 |
| Acetaminophen / Diphenhydramine HCl DC | 1632051-40-1 | | 1 |
| Acetone | 67-64-1 | | 1 |
| Acetoxy Empagliflozin | 915095-99-7 | | 1 |
| Acetyl Tetrapeptide-2 | 1239011-60-9 | | 1 |
| Acetyl Tetrapeptide-3 | 827306-88-7 | | 1 |
| Acetyl Tetrapeptide-9 | 928006-50-2 | | 1 |
| Acetylarginyltryptophyl Diphenylglycine | 1334583-93-5 | | 1 |
| Acetylcholine | 51-84-3 | Cholinesterase inhibitors | 1 |
| Acetylcholine chloride | 60-31-1 | | 1 |
| Aclidinium | 727649-81-2 | Anticholinergics/Parasympathemimetics | 1 |
| Actinoquinol | 15301-40-3 | | 1 |
| Adamantane | | | 1 |
| Adamantanone | 700-58-3 | Antivirals | 1 |
| Aescin Sodium Salt | 20977-05-3 | | 1 |
| Aflibercept | 862111-32-8 | | 1 |
| Afoxolaner Intermediates | | | 1 |
| Agrimony | | Herbal remedies | 1 |
| Alanine (-D) | 338-69-2 | Means for diseases of the bone and muscular system | 1 |
| Albaconazole | 187949-02-6 | Anti-infective Agents | 1 |
| Albiglutide | 782500-75-8 | GLP1 agonists | 1 |
| Albumin Tannate | 9006-52-4 | Antidiarrheals | 1 |
| Albuterol Sulfate | 51022-70-9 | | 1 |
| Aldesleukin | 110942-02-4 | Interleukin inhibitors | 1 |
| Aldosterone | 52-39-1 | | 1 |
| Alectinib Hydrochloride | 1256589-74-8 | | 1 |
| Alemtuzumab | 216503-57-0 | | 1 |
| Aletinib HCL | 1356963-11-5 | | 1 |
| Algamon | 65-45-2 | | 1 |
| Alizapride | 59338-93-1 | Dopamine antagonists | 1 |