By API Standards
- Cabazitaxel
- Cabergoline
- Cabozantinib
- Caffeine
- Calcitriol
- Calcium
- Calcium Folinate
- Canagliflozin
- Candesartan
- Candesartan Cilexetil
- Capivasertib
- Captopril
- Carbamazepine
- Carbazochrome
- Carbidopa
- Carbimazole
- Carbinoxamine
- Carbodenafil
- Carfilzomib
- Cariprazine
- Carnitine
- Carvedilol
- Cefaclor
- Cefadroxil
- Cefazedone
- Cefazolin
- Cefdinir
- Ceffeine
- Cefixime
- Cefpodoxime
- Ceftriaxone
- Ceftriaxone Sodium
- Celecoxib
- Celesevelam
- Celiprolol
- Cenobamate
- Cephalexin
- Cephalosporin
- Cephalothin Sodium
- Ceramide
- Ceritinib
- Cetirizine
- Cetrizine
- Cevimeline
- Chidamide
- CHIR99021
- Chloramphenicol
- Chlordiazepoxide
- Chlorhexidine
- Chlorimuron
- Chlormadinone Acetate
- Chlorocresol
- Chloroquine
- Chloroquinoline
- Chlorphenamine
- Chlorphenamine Maleate
- Chlorpromazine
- Chlorthalidone
- Chlorzoxazone
- Cholecalciferol
- Cholic Acid
- Ciclesonide
- Ciclopirox
- Cilnidipine
- Cilostazol
- Cinacalcet
- Cinchocaine
- Cinnarizine
- Ciprofibrate
- Ciprofloxacin
- Ciprofloxacin Hydrochloride
- Citalopram
- Citalopram Hydrobromide
- Citicoline
- Cladribine
- Clarithromycin
- Clavulanate
- Clavulanate Potassium
- Clavulanic Acid
- Clevidipine
- Clidinium Bromide
- Clindamycin
- Clioquinol
- Clobazam
- Clobetasol
- Clomiphene
- Clomipramine
- Clonazepam
- Clonidine
- Clopidogrel
- Clopidogrel Bisulfate
- Clopidogrel Hydrogen Sulfate
- Cloprostenol Sodium
- Closantel
- Clostebol Acetate
- Clotrimazole
- Cloxacillin
- Clozapine
- Cobicistat
- Colchicine
- Colistin
- Corticosterone
- Cortisone Acetate
- Cortodoxone
- Creatinine
- Crisaborole
- Crizotinib
- Cromolyn
- Crospovidone
- Crosscarmellose
- Curcumin
- Cyanocobalamin
- Cyantraniliprole
- Cyclizine
- Cyclobenzaprine
- Cyclocytidine
- Cycloguanil
- Cyclophosphamide
- Cycloserine
- Cyclosporine
- Cyproterone
- Cystamine
- Cysteamine
- Cysteine Hydrochloride Monohydrate
- Cytarabine
- Cytidine