By API Standards
- Cabozatinib
- Caffeine
- Canagliflozin
- Candesartan
- Canrenone
- Captopril
- Carbamazepine
- Carbidopa
- Carbodenafil
- Cariprazine
- Carvedilol
- Cefuroxime
- Celecoxib
- Cenobamate
- Ceritinib
- Cetirizine
- Chidamide
- CHIR99021
- Chlordiazepoxide
- Chloroquine
- Chlorphenamine
- Chlorpromazine
- Chlorthalidone
- Chlorzoxazone
- Cholesterol
- Ciclesonide
- Cilostazol
- Cinacalcet
- Cinnarizine
- Ciprofibrate
- Ciprofloxacin
- Citalopram
- Citicoline
- Citronellyl
- Clarithromycin
- Clevidipine
- Clidinium Bromide
- Clobetasol
- Clofentezine
- Clomipramine
- Clonazepam
- Clonidine
- Clopidogrel
- Clozapine
- Curcumin
- Cyantraniliprole
- Cycloguanil
- Cyclosporin A