| Asafoetida tincture | | | 1 |
| Ash leaf | | Herbal remedies | 1 |
| Aurantii amarae fructi cortex | | Herbal remedies | 1 |
| Aurantii fructus immaturus | | Herbal remedies | 1 |
| Auristatin E | 160800-57-7 | | 1 |
| Avapritinib | 1703793-34-3 | Enzyme Replacements/modifiers | 1 |
| Avelumab | 1537032-82-8 | Monoclonal antibodies | 1 |
| Avermectin | 73989-17-0 | Antiparasitics | 1 |
| Azacidine | 202825-46-5 | | 1 |
| Azilsartan Medoxomil Potassium | 863031-21-4 | | 1 |
| Azintamide | 2216711-16-9 | Other gastrointestinal agents | 1 |
| Azithromycin Bitterless | | | 1 |
| Azithromycin Monohydrate | 83905-01-5 | | 1 |
| BES | | Intravenous anesthetics | 1 |
| Bacillus Coagulans | 68038-74-2 | | 1 |
| Bakuchiol | 10309-37-2 | | 1 |
| Baloxavir | 1985605-59-1 | Anti-infective Agents | 1 |
| Baloxavir Marboxil | 1985606-14-1 | | 1 |
| Baloxavir Marboxil Intermediates | | | 1 |
| Bank cress herb | | Herbal remedies | 1 |
| Bear's garlic cut | | Herbal remedies | 1 |
| Bearberry leaf | | Herbal remedies | 1 |
| Bedaquiline intermediates | 654655-69-3 | | 1 |
| Belatacept | 706808-37-9 | | 1 |
| Belzutifan | 1672668-24-4 | Anticancer drugs | 1 |
| Bendamustine Hydrochloride Monohydrate | 3543-75-7 | | 1 |
| Benzhydrol | 91-01-0 | | 1 |
| Benzindentriol | 37319-17-8 | Retinoids | 1 |
| Benzododecinium | 10328-35-5 | Anti-infective Agents | 1 |
| Benzofuran-6-carboxylic acid | 77095-51-3 | Hypothalamic hormones | 1 |
| Benzoin Tincture | | | 1 |
| Benzophenone | 119-61-9 | Dermatics | 1 |
| Benzthiazide | 91-33-8 | Diuretics | 1 |
| Benzyl Benzoate emulsion | | | 1 |
| Benzyl Benzoate one litre | | | 1 |
| Berbery bark | | Herbal remedies | 1 |
| Bergamote fruit | | Herbal remedies | 1 |
| Betadex | 7585-39-9 | Additives | 1 |
| Bevantolol | 59170-23-9 | Beta blockers | 1 |
| Bictegravir | 1611493-60-7 | | 1 |