| Carbamazepin | Zentrallabor | |
| Cariprazin | Zentrallabor | |
| Chlorpromazin | Zentrallabor | |
| Chlorprothixen | Zentrallabor | |
| Citalopram & Metabolit Desmethylcitalopram | Zentrallabor | |
| Clomethiazol | Zentrallabor | |
| Clomipramin & Metabolit Norclomipramin | Zentrallabor | |
| Clonazepam | Zentrallabor | |
| Clozapin & Metabolit Desmethylclozapin | Zentrallabor | |
| Coffein | Zentrallabor | |
| Cyclosporin | Zentrallabor | |