| Macitentan Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Macitentan |
| Magnesium acetate Drug Metabolism |  | Metabolic | Magnesium acetate |
| Magnesium acetate tetrahydrate Drug Metabolism |  | Metabolic | Magnesium acetate tetrahydrate |
| Magnesium ascorbate Drug Metabolism |  | Metabolic | Magnesium ascorbate |
| Magnesium carbonate Drug Metabolism |  | Metabolic | Magnesium carbonate |
| Magnesium citrate Drug Metabolism |  | Metabolic | Magnesium citrate |
| Magnesium gluconate Drug Metabolism |  | Metabolic | Magnesium gluconate |
| Magnesium glycinate Drug Metabolism |  | Metabolic | Magnesium glycinate |
| Magnesium malate Drug Metabolism |  | Metabolic | Magnesium malate |
| Magnesium Salicylate Action Pathway |  | Drug Action | Glutamic acid / Glutathione / Dinoprostone / Calcium / Magnesium cation / Magnesium salicylate / Zinc / Prostaglandin D2 / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| Magnesium Salicylate NSAID Action Pathway |  | Drug Action | Glutathione / Dinoprostone / Calcium / Magnesium salicylate / Mesoheme / Prostaglandin G2 / Arachidonic Acid |
| Magnesium Sulfate Action Pathway |  | Drug Action | Choline / ATP / Magnesium sulfate / Potassium cation / Calcium / Magnesium cation / Cyclic adenosine monophosphate / Acetylcholine / Acetic acid |
| Malate-Aspartate Shuttle |  | Metabolic | Pyridoxal phosphate / Aspartic acid / Glutamic acid / NADH / Calcium / Oxogluric acid |
| Malathion Action Pathway |  | Drug Action | Choline / Malathion / Calcium / Magnesium cation / Acetylcholine / Acetic acid |
| Malathion Predicted Metabolism Pathway |  | Metabolic | Malathion / Mesoheme |
| Malonic Aciduria |  | Disease | Pyridoxal phosphate / Biotin / Adenosine phosphate / Glutamic acid / NADH / Valine / ATP / Oxogluric acid / beta-Alanine / Flavin adenine dinucleotide / Hydracrylic acid / Propanoic acid / Pyrophosphoric acid / Methylmalonic Acid / Citric acid / Malonyl-CoA / 2-Oxobutanoic Acid |
| Malonic Aciduria |  | Disease | Pyridoxal phosphate / Biotin / Adenosine phosphate / Glutamic acid / NADH / Valine / ATP / Oxogluric acid / beta-Alanine / Flavin adenine dinucleotide / Hydracrylic acid / Propanoic acid / Pyrophosphoric acid / Methylmalonic Acid / Citric acid / Malonyl-CoA / 2-Oxobutanoic Acid |
| Malonyl-CoA Decarboxylase Deficiency |  | Disease | Pyridoxal phosphate / Biotin / Adenosine phosphate / Glutamic acid / NADH / Valine / ATP / Oxogluric acid / beta-Alanine / Flavin adenine dinucleotide / Hydracrylic acid / Propanoic acid / Pyrophosphoric acid / Methylmalonic Acid / Citric acid / Malonyl-CoA / 2-Oxobutanoic Acid |
| Malonyl-CoA Decarboxylase Deficiency |  | Disease | Pyridoxal phosphate / Biotin / Adenosine phosphate / Glutamic acid / NADH / Valine / ATP / Oxogluric acid / beta-Alanine / Flavin adenine dinucleotide / Hydracrylic acid / Propanoic acid / Pyrophosphoric acid / Methylmalonic Acid / Citric acid / Malonyl-CoA / 2-Oxobutanoic Acid |
| Manidipine Action Pathway |  | Drug Action | ATP / Calcium / Magnesium cation / Manidipine |
| Mannitol busulfan Drug Metabolism |  | Metabolic | Mannitol busulfan |
| MAPK/p38 |  | Signaling | Magnesium cation |
| Maple Syrup Urine Disease |  | Disease | Pyridoxal phosphate / Biotin / Succinic acid / Glutamic acid / Pyridoxal / Leucine / NADH / Valine / Isoleucine / ATP / Acetoacetic acid / Oxogluric acid / Flavin adenine dinucleotide / alpha-Ketoisocaproic acid / alpha-Ketoisovalerate / Methylmalonic Acid |
| Maple Syrup Urine Disease |  | Disease | Pyridoxal phosphate / Biotin / Succinic acid / Glutamic acid / Pyridoxal / Leucine / NADH / Valine / Isoleucine / ATP / Acetoacetic acid / Oxogluric acid / Flavin adenine dinucleotide / alpha-Ketoisocaproic acid / alpha-Ketoisovalerate / Methylmalonic Acid |
| Maprotiline Action Pathway |  | Drug Action | Pyridoxal phosphate / Ascorbic acid / Tyrosine / Sapropterin / Norepinephrine / Maprotiline / Dopamine / Levodopa / Calcium / Iron / Pyrroloquinoline Quinone |