| Didanosine Predicted Metabolism Pathway |  | Metabolic | Didanosine / Mesoheme |
| Dienogest Action Pathway |  | Drug Action | NADH / ATP / Progesterone / Testosterone / Estrone / Potassium cation / Calcium / Magnesium cation / Androstenedione / Cyclic adenosine monophosphate / Mesoheme / Pyrophosphoric acid / Cholesterol / 2-Hydroxyestradiol / Dienogest |
| Dienogest Drug Metabolism Pathway |  | Metabolic | Dienogest |
| Difelikefalin Opioid Agonist Action Pathway |  | Drug Action | ATP / Calcium / Magnesium cation / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid / Sar9, Met (O2)11-Substance P / Difelikefalin |
| Difenoxin Predicted Metabolism Pathway |  | Metabolic | Difenoxin / Mesoheme |
| Diflorasone Action Pathway |  | Drug Action | Glutathione / Diflorasone / Dinoprostone / Calcium / Prostaglandin D2 / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| Diflunisal Action Pathway |  | Drug Action | Glutamic acid / Glutathione / Diflunisal / Dinoprostone / Calcium / Magnesium cation / Zinc / Prostaglandin D2 / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| Diflunisal NSAID Action Pathway |  | Drug Action | Glutathione / Diflunisal / Dinoprostone / Calcium / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| Difluprednate Action Pathway |  | Drug Action | Glutathione / Dinoprostone / Calcium / Prostaglandin D2 / Mesoheme / Prostaglandin G2 / Arachidonic Acid / Difluprednate |
| Digoxin Cardiac Action Pathway |  | Drug Action | Digoxin / Potassium cation / Calcium |
| Dihydralazine Drug Metabolism |  | Metabolic | Dihydralazine |
| Dihydrocodeine Opioid Agonist Action Pathway |  | Drug Action | ATP / Calcium / Magnesium cation / Dihydrocodeine / Dihydromorphine / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Mesoheme / Pyrophosphoric acid |
| Dihydroergocryptine Mechanism of Action Action Pathway |  | Drug Action | Pyridoxal phosphate / Tyrosine / ATP / Dopamine / Levodopa / Calcium / Magnesium cation / Iron / Cyclic adenosine monophosphate / Pyrophosphoric acid / Dihydroergocryptine |
| Dihydroergotamine Mechanism of Action Action Pathway |  | Drug Action | ATP / Dihydroergotamine / Calcium / Magnesium cation / Cyclic adenosine monophosphate / Pyrophosphoric acid |
| Dihydroetorphine Opioid Agonist Action Pathway |  | Drug Action | ATP / Calcium / Magnesium cation / Dihydroetorphine / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid / Sar9, Met (O2)11-Substance P |
| Dihydromorphine Action Pathway |  | Drug Action | ATP / Norepinephrine / Dopamine / Potassium cation / Calcium / Dihydromorphine |
| Dihydromorphine Opioid Agonist Action Pathway |  | Drug Action | ATP / Calcium / Magnesium cation / Dihydromorphine / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid / Sar9, Met (O2)11-Substance P |
| Dihydropyrimidinase Deficiency |  | Disease | L-Glutamine / ATP / Calcium / Magnesium cation / Iron / Zinc / 5-O-phosphono-alpha-D-ribofuranosyl diphosphate / Thymidine monophosphate / Dihydrouracil / Dihydroorotic Acid / Orotic acid / Cytidine-5'-Triphosphate / Uridine / Orotidylic acid / Ribose-1-Phosphate / beta-Alanine / Flavin adenine dinucleotide / Flavin mononucleotide / Uracil / Uridine-5'-Diphosphate / Thymine / Uridine monophosphate / Deoxyuridine monophosphate / Pyrophosphoric acid / N-Carbamoylaspartic acid / Thymidine |
| Dihydropyrimidinase Deficiency |  | Disease | L-Glutamine / ATP / Calcium / Magnesium cation / Iron / Zinc / 5-O-phosphono-alpha-D-ribofuranosyl diphosphate / Thymidine monophosphate / Dihydrouracil / Dihydroorotic Acid / Orotic acid / Cytidine-5'-Triphosphate / Uridine / Orotidylic acid / Ribose-1-Phosphate / beta-Alanine / Flavin adenine dinucleotide / Flavin mononucleotide / Uracil / Uridine-5'-Diphosphate / Thymine / Uridine monophosphate / Deoxyuridine monophosphate / Pyrophosphoric acid / N-Carbamoylaspartic acid / Thymidine |
| Dihydropyrimidine Dehydrogenase Deficiency (DHPD) |  | Disease | Pyridoxal phosphate / Tetrahydrofolic acid / Ademetionine / Pyruvic acid / Arginine / Adenosine phosphate / Serine / Methionine / Glutamic acid / Glycine / Creatine / Cysteine / NADH / Alanine / ATP / Aminolevulinic acid / Magnesium cation / Zinc / N,N-dimethylglycine / Glycocyamine / Oxogluric acid / 3-Hydroxypyruvic Acid / Orotidylic acid / Flavin adenine dinucleotide / Pyruvaldehyde / Formaldehyde / 2-Amino-3-Ketobutyric Acid / D-Serine / Pyrophosphoric acid / Glyoxylic acid / Dexfosfoserine / 2-Oxobutanoic Acid |
| Dihydrostreptomycin Drug Metabolism Pathway |  | Metabolic | Dihydrostreptomycin |
| Diloxanide furoate Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Diloxanide furoate |
| Diltiazem Action Pathway |  | Drug Action | ATP / Diltiazem / Potassium cation / Calcium |
| Diltiazem Calcium Channel Cardiac Muscle Relaxation Action Pathway |  | Drug Action | Diltiazem / Potassium cation / Calcium / Cyclic adenosine monophosphate |
| Diltiazem Calcium Channel Vasodilation Action Pathway |  | Drug Action | ATP / Diltiazem / Calcium / Magnesium cation |