| Inosine Pranobex | | Antivirals | 2 |
| Inositol | 87-89-8 | Gastrointestinal Agents | 2 |
| Insulin Lispro | 133107-64-9 | Insulin | 2 |
| Ipilimumab | 477202-00-9 | Monoclonal antibodies | 2 |
| Ipragliflozin | 761423-87-4 | Gastrointestinal Agents | 2 |
| Iron | 7439-89-6 | Iron preparations | 2 |
| Isavuconazonium sulfate | 960404-48-2 | Antimycotics | 2 |
| Isoconazole | 27523-40-6 | Antimycotics | 2 |
| Isoflavone | 125275-25-4 | | 2 |
| Isoxsuprine Hydrochloride | | Adrenergic agents | 2 |
| Josamycin | 16846-24-5 | Macrolides | 2 |
| Kanamycin Mono Sulphate | 25389-94-0 | Aminoglycosides | 2 |
| Ketazolam | 27223-35-4 | Benzodiazepines | 2 |
| L-Ascorbic Acid (2-Glucoside) | 129499-78-1 | | 2 |
| L-Theanine | 3081-61-6 | | 2 |
| Lactobacillus acidophilus | 7778-80-5 | | 2 |
| Lapatinib Ditosylate | 388082-78-8 | | 2 |
| Lasmiditan | 439239-90-4 | Serotonin receptor agonists | 2 |
| Lemon oil | 136-47-0 | Herbal remedies | 2 |
| Lemon verbena leaf | | Herbal remedies | 2 |
| Lepirudin | 138068-37-8 | Direct thrombin inhibitors | 2 |
| Letermovir | 917389-32-3 | | 2 |
| Leucovorin | 58-05-9 | Antidotes | 2 |
| Leuprolide Acetate | 74381-53-6 | Gonadorelin agonists | 2 |
| Levoleucovorin | 68538-85-2 | Antidotes | 2 |
| Levorphanol | 77-07-6 | Opioid analgesics | 2 |
| Liraglutide Main Chain (GLP7-37) | 204521-68-6 | | 2 |
| Lisuride | 18016-80-3 | Dopamine agonists | 2 |
| Lomitapide | 182431-12-5 | Lipid-lowering agents | 2 |
| Lomustine | 13010-47-4 | Cytostatic antibiotics | 2 |
| Lotilaner | 1369852-71-0 | | 2 |
| Lurasidone Hydrochloride | 367514-88-3 | | 2 |
| Lutein | 127-40-2 | | 2 |
| Macrogol 3000 | | Laxatives | 2 |
| Macrogol 8000 | | Laxatives | 2 |
| Macrogol Cetostearyl Ether 25 | 68439-49-6 | Emulsifiers | 2 |
| Magnesium Aluminum Silicate | 1327-43-1 | Magnesium Salts | 2 |
| Magnesium acetate tetrahydrate | 16674-78-5 | Magnesium Salts | 2 |
| Magnesium aspartate | 18962-61-3 | Magnesium Salts | 2 |
| Malathion | 121-75-5 | Scabicides | 2 |