| Ketamine NMDA Antagonist Action Pathway |  | Drug Action | L-Glutamine / Glutamic acid / Ketamine / Calcium |
| Ketamine Predicted Metabolism Pathway |  | Metabolic | Ketamine / Mesoheme |
| Ketazolam Action Pathway |  | Drug Action | Pyridoxal phosphate / Glutamic acid / ATP / Calcium / Magnesium cation / Ketazolam / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid |
| Ketobemidone Action Pathway |  | Drug Action | ATP / Norepinephrine / Dopamine / Potassium cation / Calcium / Ketobemidone |
| Ketobemidone Opioid Agonist Action Pathway |  | Drug Action | ATP / Calcium / Magnesium cation / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid / Sar9, Met (O2)11-Substance P / Ketobemidone |
| Ketoconazole Anti-fungal Action Pathway |  | Drug Action | Ketoconazole / Formic acid / Mesoheme / Ergosterol |
| Ketoconazole Predicted Metabolism Pathway |  | Metabolic | Ketoconazole / Mesoheme |
| Ketone Body Metabolism |  | Metabolic | Succinic acid / NADH / Acetoacetic acid |
| Ketoprofen Action Pathway |  | Drug Action | Glutamic acid / Glutathione / Dinoprostone / Ketoprofen / Calcium / Magnesium cation / Zinc / Prostaglandin D2 / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| Ketoprofen NSAID Action Pathway |  | Drug Action | Glutathione / Dinoprostone / Ketoprofen / Calcium / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| Ketorolac Action Pathway |  | Drug Action | Glutamic acid / Glutathione / Ketorolac / Dinoprostone / Calcium / Magnesium cation / Zinc / Prostaglandin D2 / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| Ketorolac NSAID Action Pathway |  | Drug Action | Glutathione / Ketorolac / Dinoprostone / Calcium / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| Ketotifen H1 Antihistamine Smooth Muscle Relaxation Action Pathway |  | Drug Action | Ketotifen / Calcium / Magnesium cation |
| Ketotifen H1-Antihistamine Action |  | Drug Action | Ketotifen / Calcium |
| Ketotifen H1-Antihistamine Blood Vessel Constriction Action Pathway |  | Drug Action | Arginine / Citrulline / Sapropterin / Nitric Oxide / Ketotifen / Calcium / Magnesium cation / Mesoheme / Flavin adenine dinucleotide / Flavin mononucleotide |
| Ketotifen H1-Antihistamine Immune Response Action Pathway |  | Drug Action | Ketotifen / Calcium |
| Kidney Function |  | Physiological | Cysteine / Potassium cation / Urea |
| Kidney Function - Ascending Limb of The Loop of Henle |  | Physiological | Potassium cation / Urea |
| Kidney Function - Collecting Duct |  | Physiological | Potassium cation / Zinc / Urea |
| Kidney Function - Distal Convoluted Tubule |  | Physiological | Potassium cation / Calcium / Urea |
| Kidney Function- Proximal Convoluted Tubule |  | Physiological | Cysteine / Potassium cation / Zinc / Urea |
| Kinetin Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Kinetin |
| Krabbe Disease |  | Disease | Pyridoxal phosphate / Serine / ATP / Calcium / Magnesium cation / Zinc / Uridine diphosphate glucose / Hexadecanal / Uridine-5'-Diphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium |
| L-Arginine:Glycine Amidinotransferase Deficiency |  | Disease | Pyridoxal phosphate / Ademetionine / Arginine / Aspartic acid / Ornithine / Adenosine phosphate / Succinic acid / Glutamic acid / Glycine / Creatine / Citrulline / NADH / ATP / Proline / Sapropterin / Nitric Oxide / Mesoheme / Glycocyamine / 3,4-Dihydro-2h-Pyrrolium-5-Carboxylate / Oxogluric acid / N(5)-[(hydroxyamino)(imino)methyl]-L-ornithine / Flavin adenine dinucleotide / Flavin mononucleotide / Urea / Pyrophosphoric acid / Maleic acid / 4-Carboxy-4-Aminobutanal |
| L-Arginine:Glycine Amidinotransferase Deficiency |  | Disease | Pyridoxal phosphate / Ademetionine / Arginine / Aspartic acid / Ornithine / Adenosine phosphate / Succinic acid / Glutamic acid / Glycine / Creatine / Citrulline / NADH / ATP / Proline / Sapropterin / Nitric Oxide / Mesoheme / Glycocyamine / 3,4-Dihydro-2h-Pyrrolium-5-Carboxylate / Oxogluric acid / N(5)-[(hydroxyamino)(imino)methyl]-L-ornithine / Flavin adenine dinucleotide / Flavin mononucleotide / Urea / Pyrophosphoric acid / Maleic acid / 4-Carboxy-4-Aminobutanal |