| Cinnarizine H1-Antihistamine Immune Response Action Pathway |  | Drug Action | Cinnarizine / Calcium |
| Cinoxacin Drug Metabolism |  | Metabolic | Cinoxacin |
| Cisplatin Action Pathway |  | Drug Action | ATP / Cisplatin |
| Citalopram Action Pathway |  | Drug Action | NADH / ATP / Citalopram / Norepinephrine / Dopamine / Potassium cation / Calcium / Methylamine / Mesoheme / Flavin adenine dinucleotide / Formaldehyde |
| Citalopram Mechanism of Action Action Pathway New |  | Drug Action | Pyridoxal phosphate / Tryptophan / Citalopram / Sapropterin / Calcium / Iron / Oxitriptan |
| Citalopram Metabolism Pathway |  | Drug Metabolism | NADH / Citalopram / Methylamine / Mesoheme / Flavin adenine dinucleotide / Formaldehyde |
| Citalopram Predicted Metabolism Pathway |  | Metabolic | Citalopram / Mesoheme |
| Citric Acid Cycle |  | Metabolic | Pyruvic acid / Biotin / Succinic acid / NADH / ATP / Magnesium cation / Oxogluric acid / Flavin adenine dinucleotide / Citric acid / Maleic acid |
| Citrullinemia Type I |  | Disease | Pyridoxal phosphate / Pyruvic acid / Arginine / Aspartic acid / Ornithine / L-Glutamine / Adenosine phosphate / Glutamic acid / Citrulline / NADH / Alanine / ATP / Calcium / Oxogluric acid / Urea / Pyrophosphoric acid / Maleic acid |
| Citrullinemia Type I |  | Disease | Pyridoxal phosphate / Pyruvic acid / Arginine / Aspartic acid / Ornithine / L-Glutamine / Adenosine phosphate / Glutamic acid / Citrulline / NADH / Alanine / ATP / Calcium / Oxogluric acid / Urea / Pyrophosphoric acid / Maleic acid |
| Cladribine Action Pathway |  | Drug Action | Cladribine / Iron |
| Cladribine Predicted Metabolism Pathway |  | Metabolic | Cladribine / Mesoheme |
| Clarithromycin Action Pathway |  | Drug Action | Clarithromycin |
| Clarithromycin Anti-bacterial Action Pathway |  | Drug Action | Clarithromycin / Mesoheme |
| Clascoterone Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Clascoterone |
| Clemastine H1-Antihistamine Blood Vessel Constriction Action Pathway |  | Drug Action | Arginine / Citrulline / Clemastine / Sapropterin / Nitric Oxide / Calcium / Magnesium cation / Mesoheme / Flavin adenine dinucleotide / Flavin mononucleotide |
| Clemastine H1-Antihistamine Immune Response Action Pathway |  | Drug Action | Clemastine / Nitric Oxide / Calcium |
| Clemastine H1-Antihistamine Smooth Muscle Relaxation Action Pathway |  | Drug Action | Clemastine / Calcium / Magnesium cation |
| Clemastine Predicted Metabolism Pathway |  | Metabolic | Clemastine / Mesoheme |
| Clenbuterol Action Pathway |  | Drug Action | ATP / Potassium cation / Calcium / Magnesium cation / Clenbuterol / Cyclic adenosine monophosphate |
| Clevidipine Action Pathway |  | Drug Action | ATP / Calcium / Magnesium cation / Clevidipine |
| Clindamycin Action Pathway |  | Drug Action | Clindamycin |
| Clindamycin Anti-Bacterial Action Pathway |  | Drug Action | Clindamycin |
| Clobazam Action Pathway |  | Drug Action | Pyridoxal phosphate / Glutamic acid / ATP / Clobazam / Calcium / Magnesium cation / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid |
| Clobetasol propionate Action Pathway |  | Drug Action | Glutathione / Dinoprostone / Clobetasol propionate / Calcium / Prostaglandin D2 / Mesoheme / Prostaglandin G2 / Arachidonic Acid |