| Clozapine H1-Antihistamine Blood Vessel Constriction Action Pathway |  | Drug Action | Arginine / Citrulline / Sapropterin / Clozapine / Nitric Oxide / Calcium / Magnesium cation / Mesoheme / Flavin adenine dinucleotide / Flavin mononucleotide |
| Clozapine H1-Antihistamine Immune Response Action Pathway |  | Drug Action | Clozapine / Calcium |
| Clozapine Serotonin Antagonist Action Pathway |  | Drug Action | Pyridoxal phosphate / Tryptophan / Sapropterin / Clozapine / Calcium / Iron / Oxitriptan |
| Coagulation |  | Physiological | Phylloquinone / Calcium |
| Coagulation |  | Physiological | Phylloquinone / Calcium |
| Coagulation Factor VII Human Action Pathway |  | Drug Action | Calcium / Coagulation factor VII human |
| Cocaine Action Pathway |  | Drug Action | ATP / Norepinephrine / Cocaine / Dopamine / Potassium cation / Calcium |
| Cocaine Analgesic Action Pathway |  | Drug Action | Cocaine |
| Cocaine Dopamine-reuptake Inhibitor Action Pathway |  | Drug Action | Pyridoxal phosphate / Tyrosine / ATP / Cocaine / Dopamine / Levodopa / Calcium / Magnesium cation / Iron / Cyclic adenosine monophosphate |
| Cocaine metabolism |  | Metabolic | Ethanol / Cocaine / Mesoheme |
| Cocaine Norepinephrine Reuptake Inhibitor Action Pathway |  | Drug Action | Pyridoxal phosphate / Ascorbic acid / Tyrosine / Norepinephrine / Cocaine / Dopamine / Levodopa / Calcium / Iron / Pyrroloquinoline Quinone |
| Codeine Action Pathway |  | Drug Action | NADH / ATP / Morphine / Codeine / Norepinephrine / Dopamine / Potassium cation / Calcium / Mesoheme / Uridine-5'-Diphosphate / Formaldehyde |
| Codeine Metabolism Pathway |  | Drug Metabolism | NADH / Morphine / Codeine / Mesoheme / Uridine-5'-Diphosphate / Formaldehyde |
| Codeine Opioid Action Pathway |  | Drug Action | NADH / ATP / Morphine / Codeine / Calcium / Magnesium cation / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Mesoheme / Formaldehyde / Pyrophosphoric acid / Sar9, Met (O2)11-Substance P |
| Congenital Bile Acid Synthesis Defect Type II |  | Disease | Glycine / NADH / ATP / Iron / Taurine / Mesoheme / Cholic Acid / Flavin adenine dinucleotide / Palmitic Acid / Pyrophosphoric acid / Taurocholic acid / Cholesterol / Chenodeoxycholic acid / Deoxycholic acid / Taurochenodeoxycholic acid |
| Congenital Bile Acid Synthesis Defect Type II |  | Disease | Glycine / NADH / ATP / Iron / Taurine / Mesoheme / Cholic Acid / Flavin adenine dinucleotide / Palmitic Acid / Pyrophosphoric acid / Taurocholic acid / Cholesterol / Chenodeoxycholic acid / Deoxycholic acid / Taurochenodeoxycholic acid |
| Congenital Bile Acid Synthesis Defect Type III |  | Disease | Glycine / NADH / ATP / Iron / Taurine / Mesoheme / Cholic Acid / Flavin adenine dinucleotide / Palmitic Acid / Pyrophosphoric acid / Taurocholic acid / Cholesterol / Chenodeoxycholic acid / Deoxycholic acid / Taurochenodeoxycholic acid |
| Congenital Bile Acid Synthesis Defect Type III |  | Disease | Glycine / NADH / ATP / Iron / Taurine / Mesoheme / Cholic Acid / Flavin adenine dinucleotide / Palmitic Acid / Pyrophosphoric acid / Taurocholic acid / Cholesterol / Chenodeoxycholic acid / Deoxycholic acid / Taurochenodeoxycholic acid |
| Congenital Disorder of Glycosylation CDG-IId |  | Disease | ATP / Calcium / Magnesium cation / Iron / Zinc / Uridine diphosphate glucose / Alpha-D-Galactose-1-Phosphate / Uridine-5'-Diphosphate / Uridine monophosphate / Pyrophosphoric acid / Lactose |
| Congenital Erythropoietic Porphyria (CEP) or Gunther Disease |  | Disease | Pyridoxal phosphate / Glycine / NADH / Aminolevulinic acid / Iron / Zinc / Protoporphyrin / Mesoheme / Flavin adenine dinucleotide / Uridine-5'-Diphosphate / Coproporphyrinogen III / Farnesyl diphosphate |
| Congenital Erythropoietic Porphyria (CEP) or Gunther Disease |  | Disease | Pyridoxal phosphate / Glycine / NADH / Aminolevulinic acid / Iron / Zinc / Protoporphyrin / Mesoheme / Flavin adenine dinucleotide / Uridine-5'-Diphosphate / Coproporphyrinogen III / Farnesyl diphosphate |
| Congenital Lactic Acidosis |  | Disease | Pyruvic acid / Biotin / Succinic acid / NADH / ATP / Magnesium cation / Oxogluric acid / Flavin adenine dinucleotide / Citric acid / Maleic acid |
| Congenital Lactic Acidosis |  | Disease | Pyruvic acid / Biotin / Succinic acid / NADH / ATP / Magnesium cation / Oxogluric acid / Flavin adenine dinucleotide / Citric acid / Maleic acid |
| Congenital Lipoid Adrenal Hyperplasia (CLAH) or Lipoid CAH |  | Disease | NADH / Progesterone / Hydrocortisone / Mesoheme / Cholesterol / Corticosterone / 20-hydroxycholesterol |
| Congenital Lipoid Adrenal Hyperplasia (CLAH) or Lipoid CAH |  | Disease | NADH / Progesterone / Hydrocortisone / Mesoheme / Cholesterol / Corticosterone / 20-hydroxycholesterol |