| Lusacomfar Alfa | 2640087-71-2 | Other substances | 0 |
| Luspatercept | 1373715-00-4 | Other substances | 0 |
| Lusutrombopag | 1110766-97-6 | Hematological Agents | 0 |
| Luteinizing hormone | 9002-67-9 | Hormonal Agents | 0 |
| Lutetium Lu177 Edotreotide | 321835-55-6 | Other substances | 0 |
| Lutikizumab | 1791411-57-8 | Other substances | 0 |
| Lutropin alfa | 152923-57-4 | | 0 |
| Luvadaxistat | 1425511-32-5 | Other substances | 0 |
| Lynestrenol | 52-76-6 | Genitourinary Agents | 0 |
| Lypressin | 50-57-7 | Hormonal Agents | 0 |
| Lysergic Acid Diethylamide | 50-37-3 | | 0 |
| Lysophosphotidylserine | | | 0 |
| Macelignan | 107534-93-0 | Antioxidants | 0 |
| Macimorelin | 381231-18-1 | Hormonal Agents | 0 |
| Macozinone | 1377239-83-2 | Anti-infective Agents | 0 |
| Macrogol Cetostearyl Ether 30 | | | 0 |
| Macrogol cetostearyl ether 12 | | | 0 |
| Macrogol poly(vinyl alcohol) grafted copolymer | | | 0 |
| Macrogolglycerol hydroxystearate | | | 0 |
| Macrogolglycerol ricinoleate 35 | | | 0 |
| Madecassic acid | 18449-41-7 | | 0 |
| Madecassoside | 34540-22-2 | | 0 |
| Maduramicin | 84878-61-5 | Anti-infective Agents | 0 |
| Mafosfamide | 88859-04-5 | Antineoplastics | 0 |
| Maftivimab | 2135632-36-7 | Anti-infective Agents | 0 |
| Magnesium acetate | 142-72-3 | | 0 |
| Magnesium ascorbate | 15431-40-0 | Antioxidants | 0 |
| Magnesium aspartate hydrochloride | 28184-71-6 | | 0 |
| Magnesium gluconate | 59625-89-7 | Electrolytes | 0 |
| Magnesium glycinate | 14783-68-7 | Other substances | 0 |
| Magnesium levulinate | 58505-81-0 | Electrolytes | 0 |
| Magnesium malate | 869-06-7 | | 0 |
| Magnesium peroxide | 14452-57-4 | Gastrointestinal Agents | 0 |
| Magnesium phosphate | 7757-87-1 | Additives | 0 |
| Magnesium silicate | 1343-88-0 | Gastrointestinal Agents | 0 |
| Magrolimab | 2169232-81-7 | Anticancer drugs | 0 |
| Malachite Green | 10309-95-2 | | 0 |
| Maleic Acid | 110-16-7 | | 0 |
| Malic acid | 6915-15-7 | Antidepressants | 0 |
| Malonaldehyde | 542-78-9 | | 0 |