| Avatrombopag Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Avatrombopag |
| Avobenzone Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Avobenzone |
| Axitinib Action Pathway |  | Drug Action | Calcium / Axitinib |
| Axitinib Drug Metabolism |  | Metabolic | Axitinib |
| Azatadine H1 Antihistamine Smooth Muscle Relaxation Action Pathway |  | Drug Action | Azatadine / Calcium / Magnesium cation |
| Azatadine H1-Antihistamine Action |  | Drug Action | Azatadine / Calcium |
| Azatadine H1-Antihistamine Blood Vessel Constriction Action Pathway |  | Drug Action | Arginine / Citrulline / Sapropterin / Nitric Oxide / Azatadine / Calcium / Magnesium cation / Mesoheme / Flavin adenine dinucleotide / Flavin mononucleotide |
| Azatadine H1-Antihistamine Immune Response Action Pathway |  | Drug Action | Azatadine / Calcium |
| Azathioprine Action Pathway |  | Drug Action | Tetrahydrofolic acid / Ademetionine / Aspartic acid / L-Glutamine / Adenosine phosphate / Glutamic acid / Glycine / NADH / ATP / Adenine / Adenosine / Azathioprine / Mercaptopurine / Potassium cation / Calcium / Magnesium cation / Zinc / 5-O-phosphono-alpha-D-ribofuranosyl diphosphate / Uric acid / AICA ribonucleotide / Guanosine-5'-Monophosphate / Xanthine / Guanine / Cyclic adenosine monophosphate / Mesoheme / Guanosine / Ribose-1-Phosphate / Flavin adenine dinucleotide / Hypoxanthine / Pyrophosphoric acid / Maleic acid / Inosine / 2'-Deoxyguanosine-5'-Monophosphate |
| Azathioprine Action Pathway (New) |  | Drug Action | Tetrahydrofolic acid / Ademetionine / L-Glutamine / Adenosine phosphate / Glutamic acid / Glycine / NADH / ATP / Adenine / Adenosine / Azathioprine / Mercaptopurine / Potassium cation / Magnesium cation / 5-O-phosphono-alpha-D-ribofuranosyl diphosphate / Guanine / Guanosine / Ribose-1-Phosphate / Pyrophosphoric acid |
| Azathioprine Metabolism Pathway |  | Drug Metabolism | Azathioprine / Mercaptopurine |
| Azelastine H1 Antihistamine Smooth Muscle Relaxation Action Pathway |  | Drug Action | Azelastine / Calcium / Magnesium cation |
| Azelastine H1-Antihistamine Action |  | Drug Action | Azelastine / Calcium |
| Azelastine H1-Antihistamine Blood Vessel Constriction Action Pathway |  | Drug Action | Arginine / Citrulline / Sapropterin / Nitric Oxide / Azelastine / Calcium / Magnesium cation / Mesoheme / Flavin adenine dinucleotide / Flavin mononucleotide |
| Azelastine H1-Antihistamine Immune Response Action Pathway |  | Drug Action | Azelastine / Calcium |
| Azilsartan medoxomil Action Pathway |  | Drug Action | Glutamic acid / Zinc / Azilsartan medoxomil |
| Azithromycin Action Pathway |  | Drug Action | Azithromycin |
| Azithromycin Action Pathway |  | Drug Action | Azithromycin |
| Azithromycin Predicted Metabolism Pathway |  | Metabolic | Azithromycin / Mesoheme |
| Aztreonam Drug Metabolism |  | Metabolic | Aztreonam |
| Bacterial Sepsis |  | Disease | Lysine / Arginine / Ascorbic acid / Serine / Succinic acid / Glycine / Leucine / Tryptophan / Citrulline / Threonine / Valine / Isoleucine / Sapropterin / Nitric Oxide / Epinephrine / Hydrocortisone / Iron / Formic acid / Kynurenine / Mesoheme / Flavin adenine dinucleotide / Flavin mononucleotide / Citric acid / Maleic acid / Corticotropin |
| Bafetinib Inhibition of BCR-ABL Action Pathway |  | Drug Action | Bafetinib |
| Baloxavir marboxil Action Pathway |  | Drug Action | Calcium / Baloxavir marboxil / Baloxavir |
| Baloxavir marboxil Drug Metabolism |  | Metabolic | Baloxavir marboxil |
| Balsalazide Action Pathway |  | Drug Action | Glutathione / Mesalazine / Dinoprostone / Balsalazide / Calcium / Mesoheme / Prostaglandin G2 / Arachidonic Acid |