- Calan
- Capoten
- Capozide
- Captopril
- Carafate
- Cardura
- Carisoprodol
- Casodex
- Cataflam
- Catapres
- Catapresan
- Catopil
- Ceclor
- Ceftin
- Cefzil
- Celebrex
- Celecoxib
- Celestone
- Celexa
- Cetirizine
- Cialis
- Ciclopirox
- Cilest
- Cipro
- Ciprofloxacin
- Clarinex
- Clarithromycin
- Claritin
- Cleocin Vaginal
- Cleocin-T
- Clindamycin
- Clindamycin Gel
- Clobetasol
- Clomid
- Clonidine
- Clopidogrel
- Combivent
- Cordarone
- Coreg
- Corgard
- Cortisporin
- Cosopt
- Coumadin
- Covera
- Cozaar
- Crestor
- Cutivate
- Cyclobenzaprine
- Cytomel
- Cytotec
