| cabazitaxel | cefdinir | CISplatin |
| cabozantinib | cefepime | citalopram |
| caffeine citrate | cefixime | cladribine |
| calcitonin | cefotaxime | clarithromycin |
| calcium acetate | cefpodoxime | clindamycin |
| calcium carbonate | cefprozil | cloBAZam |
| calcium chloride | ceftaroline | clofarabine |
| calcium glubionate | cefTAZidime/avibactam | clomiPRAMINE |
| calcium gluconate | cefTAZidime | clonazePAM |
| calfactant | ceftolozane/tazobactam | cloNIDine |
| canagliflozin | cefTRIAXone | clopidogrel |
| candesartan | cefuroxime | cloZAPine |
| cangrelor | celecoxib | cobicistat |
| capecitabine | cephalexin | cobimetinib |
| captopril | ceritinib | codeine |
| carBAMazepine | certolizumab | colchicine |
| carbidopa/levodopa | cetirizine | conjugated estrogens |
| CARBOplatin | cetuximab | cosyntropin |
| carfilzomib | chlorambucil | crizotinib |
| cariprazine | cholestyramine | cyanocobalamin (vitamin B12) |
| carisoprodol | cholic acid |
| carmustine | ciclesonide | cyclobenzaprine |
| carvedilol | cidofovir | cyclophosphamide |
| caspofungin | cilostazol | cycloSPORINE |
| cefaclor | cimetidine | cytarabine |
| cefadroxil | cinacalcet | |
| ceFAZolin | ciprofloxacin | |