| Imipramin & Metabolit Desimipramin | Zentrallabor | |
| Itraconazol & Metabolit Hydroxyitraconazol | Zentrallabor | |
| Ketoconazol | Zentrallabor | |
| Lacosamid | Zentrallabor | |
| Lamotrigin | Zentrallabor | |
| Lamotrigin (CDK) | CDK Zentrallabor | |
| Levetiracetam | Zentrallabor | |
| Levetiracetam (CDK) | CDK Zentrallabor | |
| Levomepromazin | Zentrallabor | |
| Linezolid | Zentrallabor | |
| Lithium | Zentrallabor | |
| Lithium (CDK) | CDK Zentrallabor | |
| Lorazepam | Zentrallabor | |
| Loxapin | Zentrallabor | |
| Lurasidon | Zentrallabor | |
| Maprotilin & Metabolit Normaprotilin | Zentrallabor | |
| Melperon | Zentrallabor | |
| Methylphenidat & Metabolit Ritalinsäure | Zentrallabor | |
| Mianserin | Zentrallabor | |
| Midazolam | Zentrallabor | |