| Boceprevir | 394730-60-0 | Other Antiretrovirals | 1 |
| Boldenone | 846-48-0 | Androgens | 1 |
| Boldo | | Herbal remedies | 1 |
| Borago herb | | Herbal remedies | 1 |
| Boric acid | | Dermatics | 1 |
| Bovine Gelatin Tannate | 9000-70-8 | Antidiarrheals | 1 |
| Bremelanotide Acetate | 189691-06-3 | Other central nervous system agents | 1 |
| Bretylium | 59-41-6 | Anti-arrhythmics | 1 |
| Brexanalone | 516-54-1 | Corticosteroids | 1 |
| Brexanolone Intermediates | | | 1 |
| Brexpiprazole intermediates | 70500-72-0 | | 1 |
| Brinzolamide Intermediates | | | 1 |
| Brivudine | 69304-47-8 | Anti-infective Agents | 1 |
| Broad spectrum cannabidiol | 13956-29-1 | Herbal remedies | 1 |
| Broad spectrum cannabinol | 521-35-7 | Herbal remedies | 1 |
| Bromocresol green | | | 1 |
| Brompheniramine Maleate | 980-71-2 | | 1 |
| Bronopol | 52-51-7 | Anti-infective Agents | 1 |
| Bucillamine | 65002-17-7 | Anti-inflammatory Agents | 1 |
| Bufalin | 465-21-4 | | 1 |
| Buformin | 692-13-7 | Other anti-diabetics | 1 |
| Burdock | | Herbal remedies | 1 |
| Butaphosphan | 17316-67-5 | | 1 |
| Butcher's broom root | | Herbal remedies | 1 |
| Butethamate Citrate | 13900-12-4 | Muscle relaxants | 1 |
| Butyl Parahydroxybenzoate | 94-26-8 | | 1 |
| Butylamine | 109-73-9 | Adrenergic agents | 1 |
| Cabozantinib intermediates | 598-10-7 | | 1 |
| Cafedrine Hydrochloride | 22465-48-1 | | 1 |
| Caffeine Citrate | 69-22-7 | | 1 |
| Calamine lotion | | | 1 |
| Calamus root | | Herbal remedies | 1 |
| Calcitonin | 9007-12-9 | Calcium regulators | 1 |
| Calcium Butyrate | 5743-27-1 | | 1 |
| Calcium D-Saccharate 4H2O | | | 1 |
| Calcium Gluceptate | 29039-00-7 | Calcium regulators | 1 |
| Calcium Hypophosphite | 7789-79-9 | | 1 |
| Calcium Magnesium Butyrate | | | 1 |
| Calcium hydrogen phosphate anhydrous | 7757-93-9 | Calcium regulators | 1 |
| Calcium iodate | 7789-80-2 | Thyreomimetics | 1 |