| Acetylsalicylic Acid Action Pathway (New) |  | Drug Action | Glutathione / Dinoprostone / Acetylsalicylic acid / Calcium / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| Aclidinium Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Aclidinium |
| Acrivastine H1 Antihistamine Smooth Muscle Relaxation Action Pathway |  | Drug Action | Calcium / Magnesium cation / Acrivastine |
| Acrivastine H1-Antihistamine Action |  | Drug Action | Calcium / Acrivastine |
| Acrivastine H1-Antihistamine Blood Vessel Constriction Action Pathway |  | Drug Action | Arginine / Citrulline / Sapropterin / Nitric Oxide / Calcium / Magnesium cation / Mesoheme / Flavin adenine dinucleotide / Flavin mononucleotide / Acrivastine |
| Acrivastine H1-Antihistamine Immune Response Action Pathway |  | Drug Action | Calcium / Acrivastine |
| Acrivastine Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Acrivastine |
| Activated charcoal Drug Metabolism |  | Metabolic | Activated charcoal |
| Activation of PKC Through G Protein-Coupled Receptor |  | Signaling | Calcium |
| Acute Intermittent Porphyria |  | Disease | Pyridoxal phosphate / Glycine / NADH / Aminolevulinic acid / Iron / Zinc / Protoporphyrin / Mesoheme / Flavin adenine dinucleotide / Uridine-5'-Diphosphate / Coproporphyrinogen III / Farnesyl diphosphate |
| Acute Intermittent Porphyria |  | Disease | Pyridoxal phosphate / Glycine / NADH / Aminolevulinic acid / Iron / Zinc / Protoporphyrin / Mesoheme / Flavin adenine dinucleotide / Uridine-5'-Diphosphate / Coproporphyrinogen III / Farnesyl diphosphate |
| Acyclovir Action Pathway (New) |  | Drug Action | Acyclovir / Magnesium cation |
| Acylcarnitine (10E)-11-(3,4-dimethyl-5-pentylfuran-2-yl)undec-10-enoylcarnitine |  | Metabolic | Biotin / Adenosine phosphate / ATP / Levocarnitine / Magnesium cation / Pyrophosphoric acid / Malonyl-CoA |
| Acylcarnitine (10E)-11-(3,4-dimethyl-5-propylfuran-2-yl)undec-10-enoylcarnitine |  | Metabolic | Biotin / Adenosine phosphate / ATP / Levocarnitine / Magnesium cation / Pyrophosphoric acid / Malonyl-CoA |
| Acylcarnitine (10E)-8-Hydroxydodec-10-enoylcarnitine |  | Metabolic | Biotin / Adenosine phosphate / ATP / Levocarnitine / Magnesium cation / Pyrophosphoric acid / Malonyl-CoA |
| Acylcarnitine (10E,12E,14E)-16-hydroxy-9-oxooctadeca-10,12,14-trienoylcarnitine |  | Metabolic | Biotin / Adenosine phosphate / ATP / Levocarnitine / Magnesium cation / Pyrophosphoric acid / Malonyl-CoA |
| Acylcarnitine (10E,12E,14E)-9-hydroxy-16-oxooctadeca-10,12,14-trienoylcarnitine |  | Metabolic | Biotin / Adenosine phosphate / ATP / Levocarnitine / Magnesium cation / Pyrophosphoric acid / Malonyl-CoA |
| Acylcarnitine (10E,12Z)-9-hydroxyoctadeca-10,12-dienoylcarnitine |  | Metabolic | Biotin / Adenosine phosphate / ATP / Levocarnitine / Magnesium cation / Pyrophosphoric acid / Malonyl-CoA |
| Acylcarnitine (10E,13E)-Nonadeca-10,13-dienoylcarnitine |  | Metabolic | Biotin / Adenosine phosphate / ATP / Levocarnitine / Magnesium cation / Pyrophosphoric acid / Malonyl-CoA |
| Acylcarnitine (10E,15Z)-9,12,13-trihydroxyoctadeca-10,15-dienoylcarnitine |  | Metabolic | Biotin / Adenosine phosphate / ATP / Levocarnitine / Magnesium cation / Pyrophosphoric acid / Malonyl-CoA |
| Acylcarnitine (10Z)-12-Hydroxyhexadecenoylcarnitine |  | Metabolic | Biotin / Adenosine phosphate / ATP / Levocarnitine / Magnesium cation / Pyrophosphoric acid / Malonyl-CoA |
| Acylcarnitine (10Z)-7-Hydroxyhexadecenoylcarnitine |  | Metabolic | Biotin / Adenosine phosphate / ATP / Levocarnitine / Magnesium cation / Pyrophosphoric acid / Malonyl-CoA |
| Acylcarnitine (10Z)-heptadec-10-enoylcarnitine |  | Metabolic | Biotin / Adenosine phosphate / ATP / Levocarnitine / Magnesium cation / Pyrophosphoric acid / Malonyl-CoA |
| Acylcarnitine (10Z)-nonadec-10-enoylcarnitine |  | Metabolic | Biotin / Adenosine phosphate / ATP / Levocarnitine / Magnesium cation / Pyrophosphoric acid / Malonyl-CoA |
| Acylcarnitine (10Z)-Pentadec-10-enoylcarnitine |  | Metabolic | Biotin / Adenosine phosphate / ATP / Levocarnitine / Magnesium cation / Pyrophosphoric acid / Malonyl-CoA |