| Entacapone Predicted Metabolism Pathway |  | Metabolic | Entacapone / Mesoheme |
| Entecavir Action Pathway |  | Drug Action | Entecavir |
| Entecavir Drug Metabolism |  | Metabolic | Entecavir |
| Enzalutamide Drug Metabolism |  | Metabolic | Enzalutamide |
| Ephedrine A1-Adrenergic Vasoconstriction Action Pathway |  | Drug Action | ATP / Ephedrine / Calcium / Magnesium cation |
| Ephedrine B1-Adrenergic Cardiac Muscle Constriction Action Pathway |  | Drug Action | ATP / Ephedrine / Calcium |
| Ephedrine B2-Adrenergic Bronchodilation Action Pathway |  | Drug Action | ATP / Potassium cation / Ephedrine / Calcium / Magnesium cation / Cyclic adenosine monophosphate |
| Ephedrine B2-Adrenergic Vasodilation Action Pathway |  | Drug Action | ATP / Potassium cation / Ephedrine / Calcium / Magnesium cation / Cyclic adenosine monophosphate |
| Epicriptine Mechanism of Action Action Pathway |  | Drug Action | Pyridoxal phosphate / Tyrosine / ATP / Dopamine / Levodopa / Calcium / Magnesium cation / Iron / Cyclic adenosine monophosphate / Pyrophosphoric acid / Epicriptine |
| Epinastine H1 Antihistamine Smooth Muscle Relaxation Action Pathway |  | Drug Action | Epinastine / Calcium / Magnesium cation |
| Epinastine H1-Antihistamine Action |  | Drug Action | Epinastine / Calcium |
| Epinastine H1-Antihistamine Blood Vessel Constriction Action Pathway |  | Drug Action | Arginine / Citrulline / Sapropterin / Nitric Oxide / Epinastine / Calcium / Magnesium cation / Mesoheme / Flavin adenine dinucleotide / Flavin mononucleotide |
| Epinastine H1-Antihistamine Immune Response Action Pathway |  | Drug Action | Epinastine / Calcium |
| Epinephrine Action Pathway |  | Drug Action | ATP / Epinephrine / Potassium cation / Calcium |
| Epinephrine B2-Adrenergic Bronchodilation Action Pathway |  | Drug Action | ATP / Epinephrine / Calcium / Magnesium cation / Cyclic adenosine monophosphate |
| Epirubicin Action Pathway |  | Drug Action | Epirubicin / Magnesium cation |
| Epirubicin Predicted Metabolism Pathway |  | Metabolic | Epirubicin / Mesoheme |
| Eplerenone Action Pathway |  | Drug Action | Eplerenone / Potassium cation / Urea |
| Eplerenone Action Pathway (Old) |  | Drug Action | Cysteine / Eplerenone / Potassium cation / Urea |
| Epoprostenol Action Pathway |  | Drug Action | Calcium / Magnesium cation / Cyclic adenosine monophosphate |
| Eprosartan Action Pathway |  | Drug Action | Eprosartan / Potassium cation / Zinc |
| Eptifibatide Action Pathway |  | Drug Action | Eptifibatide |
| Eptifibatide Action Pathway (new) |  | Drug Action | Eptifibatide / Von Willebrand factor human |
| Erdosteine Drug Metabolism |  | Metabolic | Erdosteine |
| Ergoloid mesylate Mechanism of Action Action Pathway |  | Drug Action | Pyridoxal phosphate / Tyrosine / ATP / Dopamine / Ergoloid mesylate / Levodopa / Calcium / Magnesium cation / Iron / Cyclic adenosine monophosphate / Pyrophosphoric acid |