| Morphinan Derivatives | Not Available | 2 | 6 | Details |
| Morphinans | Compounds based on a partially saturated iminoethanophenanthrene, which can be describe... more | 36 | 203 | Details |
| Morphine Derivatives | Analogs or derivatives of morphine. | 14 | 84 | Details |
| Morphinian derivatives | Not Available | 0 | 0 | Details |
| Morpholines | Cyclic compounds that include atoms other than carbon in their ring structure. | 19 | 60 | Details |
| Motilin, agonists | Not Available | 1 | 1 | Details |
| Mouthwashes | Solutions for rinsing the mouth, possessing cleansing, germicidal, or palliative proper... more | 3 | 130 | Details |
| Mouthwashes and Gargles | Not Available | 4 | 11 | Details |
| mRNA Vaccines | Vaccines formulated with recombinant mRNAs which are taken up by the host cells that tr... more | 15 | 5 | Details |
| mTOR Inhibitor Immunosuppressant | Not Available | 2 | 19 | Details |
| mTOR Inhibitors | Medications that exert their immunosuppressive effects via inhibition of the mammalian ... more | 10 | 41 | Details |
| mu-Opioid Receptor Agonist | Not Available | 2 | 10 | Details |
| Mucocutaneous Epithelial Cell Growth Factor | Not Available | 1 | 3 | Details |
| Mucolytics, bromhexine derivatives | Not Available | 0 | 0 | Details |
| Mucolytics, non-bromhexine derivatives | Not Available | 0 | 0 | Details |
| Mucopolysaccharidosis III | Not Available | 1 | 0 | Details |
| Mucoproteins | Conjugated proteins in which mucopolysaccharides are combined with proteins. The mucopo... more | 1 | 0 | Details |
| Mucosal tolerance inductors | Not Available | 0 | 0 | Details |
| Mucosal tolerance inhibitors | Not Available | 0 | 0 | Details |
| Multidrug Resistance Protein Inhibitors | Not Available | 0 | 0 | Details |
| Multidrug Resistance-Associated Proteins | A sequence-related subfamily of ATP-BINDING CASSETTE TRANSPORTERS that actively transpo... more | 2 | 1 | Details |
| Multifunctional Enzymes | Molecules that contain multiple active sites which are used to catalyze more than one e... more | 1 | 2 | Details |
| Multiple Myeloma, drug therapy | Not Available | 3 | 10 | Details |
| Multiple Sclerosis | Not Available | 1 | 4 | Details |
| Multipotent Stem Cells | Specialized stem cells that are committed to give rise to cells that have a particular ... more | 1 | 0 | Details |