| Asciminib Drug Metabolism |  | Metabolic | Asciminib |
| Asciminib Inhibition of BCR-ABL |  | Drug Action | Asciminib |
| Asenapine Dopamine Antagonist Action Pathway |  | Drug Action | Pyridoxal phosphate / Tyrosine / ATP / Dopamine / Levodopa / Calcium / Iron / Cyclic adenosine monophosphate / Asenapine |
| Asenapine Drug Metabolism |  | Metabolic | Asenapine |
| Asenapine Serotonin antagonist Action Pathway |  | Drug Action | Pyridoxal phosphate / Tryptophan / Sapropterin / Calcium / Iron / Acepromazine / Oxitriptan / Asenapine |
| Aspartate Metabolism |  | Metabolic | Pyridoxal phosphate / Arginine / Aspartic acid / L-Glutamine / Adenosine phosphate / Glutamic acid / Citrulline / ATP / Asparagine / Magnesium cation / Zinc / D-Aspartic Acid / Oxogluric acid / beta-Alanine / Flavin adenine dinucleotide / Acetic acid / Pyrophosphoric acid / N-Carbamoylaspartic acid / Maleic acid |
| Astemizole H1 Antihistamine Smooth Muscle Relaxation Action Pathway |  | Drug Action | Astemizole / Calcium / Magnesium cation |
| Astemizole H1-Antihistamine Action |  | Drug Action | Astemizole / Calcium |
| Astemizole H1-Antihistamine Blood Vessel Constriction Action Pathway |  | Drug Action | Arginine / Citrulline / Sapropterin / Nitric Oxide / Astemizole / Calcium / Magnesium cation / Mesoheme / Flavin adenine dinucleotide / Flavin mononucleotide |
| Astemizole H1-Antihistamine Immune Response Action Pathway |  | Drug Action | Astemizole / Calcium |
| Atazanavir Action Pathway |  | Drug Action | Atazanavir / Magnesium cation |
| Atazanavir Predicted Metabolism Pathway |  | Metabolic | Atazanavir / Mesoheme |
| Atenolol Action Pathway |  | Drug Action | ATP / Atenolol / Potassium cation / Calcium |
| Atenolol Action Pathway (New) |  | Drug Action | ATP / Atenolol / Calcium |
| Atogepant Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Atogepant |
| Atomoxetine Action Pathway (New) |  | Drug Action | Pyridoxal phosphate / Ascorbic acid / Tyrosine / Atomoxetine / Sapropterin / Norepinephrine / Dopamine / Levodopa / Calcium / Iron / Pyrroloquinoline Quinone |
| Atorvastatin Action Pathway |  | Drug Action | Calcium / Zinc / Cholesterol |
| Atorvastatin Action Pathway (New) |  | Drug Action | Calcium / Zinc / Cholesterol |
| Atosiban Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Atosiban |
| Atropine M1/3/5 Muscarinic Poisoning Action Pathway |  | Drug Action | Choline / Atropine / Calcium / Magnesium cation / Acetylcholine / Acetic acid |
| Atropine M2 Cardiac Muscle Contraction Action Pathway |  | Drug Action | Choline / ATP / Atropine / Potassium cation / Calcium / Magnesium cation / Cyclic adenosine monophosphate / Acetylcholine / Pyrophosphoric acid |
| Auranofin Drug Metabolism |  | Metabolic | Auranofin |
| Aurothioglucose Drug Metabolism |  | Metabolic | Aurothioglucose |
| Autophagy |  | Signaling | Adenosine phosphate / Calcium |
| Avapritinib Drug Metabolism |  | Metabolic | Avapritinib |