| Multiprotein Complexes | Macromolecular complexes formed from the association of defined protein subunits. | 0 | 0 | Details |
| Multivitamins With Minerals | Not Available | 0 | 0 | Details |
| Mumps Vaccine | Not Available | 0 | 0 | Details |
| Muramic Acids | Compounds consisting of glucosamine and lactate joined by an ether linkage. They occur ... more | 4 | 3 | Details |
| Muramidase | Not Available | 1 | 1 | Details |
| Muramidase, antagonists & inhibitors | Not Available | 2 | 2 | Details |
| Muscarinic Agonists | Drugs that bind to and activate muscarinic cholinergic receptors. Muscarinic agonists a... more | 9 | 46 | Details |
| Muscarinic Antagonists | Drugs that bind to but do not activate MUSCARINIC RECEPTORS, thereby blocking the actio... more | 130 | 1179 | Details |
| Muscle Relaxants | A muscle relaxant is a drug that affects skeletal muscle function and decreases the mus... more | 67 | 304 | Details |
| Muscle Relaxants, Centrally Acting Agents | A heterogeneous group of drugs used to produce muscle relaxation, excepting the neuromu... more | 46 | 235 | Details |
| Muscle Relaxants, Peripherally Acting Agents | Not Available | 22 | 72 | Details |
| Muscular Dystrophy, Duchenne | Not Available | 2 | 2 | Details |
| Musculo-Skeletal System | Not Available | 185 | 987 | Details |
| Mustard Compounds | Strong alkylating and immunosuppressive agents whose biological activity is based on th... more | 26 | 66 | Details |
| Mutagens | Chemical agents that increase the rate of genetic mutation by interfering with the func... more | 18 | 57 | Details |
| Mycobacterium | Not Available | 1 | 0 | Details |
| Mycobacterium tuberculosis | Not Available | 0 | 0 | Details |
| Mycophenolic Acid and Prodrugs | Not Available | 2 | 36 | Details |
| Mycotoxins | Toxic compounds produced by FUNGI. | 7 | 12 | Details |
| Mydriatics | Agents that dilate the pupil. They may be either sympathomimetics or parasympatholytics. | 14 | 106 | Details |
| Mydriatics and Cycloplegics | Not Available | 10 | 69 | Details |
| Myelin Basic Protein | Not Available | 1 | 2 | Details |
| Myelin Proteins | MYELIN-specific proteins that play a structural or regulatory role in the genesis and m... more | 3 | 3 | Details |
| Myelin-Associated Glycoprotein, antagonists & inhibitors | Not Available | 1 | 1 | Details |
| Myeloablative Agonists | Agents that destroy bone marrow activity. They are used to prepare patients for BONE MA... more | 5 | 34 | Details |