| 43742-0665 | Serotonin | Serotonin (hydrochloride) | Liquid | Oral | Deseret Biologicals, Inc. | Human Otc Drug |
| 43857-0242 | Serotonin | Serotonin (hydrochloride) | Liquid | Oral | Bioactive Nutritional | Human Otc Drug |
| 43857-0243 | Serotonin | Serotonin | Liquid | Oral | Bioactive Nutritional | Human Otc Drug |
| 43857-0245 | Serotonin | Serotonin (hydrochloride) | Liquid | Oral | Bioactive Nutritional, Inc. | Human Otc Drug |
| 63083-1543 | Serotonin 1543 | Serotonin | Liquid | Oral | Professional Complementary Health Formulas | Human Otc Drug |
| 43742-0059 | Serotonin | | | | Deseret Biologicals, Inc. | |
| 43742-0295 | Serotonin | | | | Deseret Biologicals, Inc. | |
| 43857-0008 | Serotonin | | | | Bioactive Nutritional, Inc. | |
| 43857-0043 | Serotonin | | | | Bioactive Nutritional, Inc. | |
| 43857-0095 | Serotonin | | | | Bioactive Nutritional, Inc. | |
| 55714-6026 | Serotonin | | | | Newton Laboratories, Inc. | |
| 57520-0226 | Serotonin | | | | Apotheca Company | |
| 57520-0302 | Serotonin | | | | Apotheca Company | |
| 57520-0330 | Serotonin | | | | Apotheca Company | |
| 57520-0755 | Serotonin | | | | Apotheca Company | |
| 63776-850 | Serotonin | | | | Viatrexx Bio Incorporated | |