| MSAA | multiple sclerosis-associated agent |
|---|---|
| narco | narcotic, narcotic addict, drug enforcement agent |
| NMB | neuromedin B; neuromuscular blockade; neuromuscular blocking; neuromuscular blocker/blocking [drug, ... |
| NMBA | neuromuscular blocking agent |
| NSAIA | nonsteroidal anti-inflammatory agent |