| Neuropilin-1 | Not Available | 1 | 1 | Details |
| Neuroprotective Agents | Drugs intended to prevent damage to the brain or spinal cord from ischemia, stroke, con... more | 55 | 189 | Details |
| Neurotoxic agents | Not Available | 147 | 1359 | Details |
| Neurotoxins | Toxic substances from microorganisms, plants or animals that interfere with the functio... more | 8 | 14 | Details |
| Neurotransmitter Agents | Agents affecting the activity of neurotransmitter systems. | 681 | 4299 | Details |
| Neurotransmitter Uptake Inhibitors | Drugs that inhibit the transport of neurotransmitters into axon terminals or into stora... more | 61 | 692 | Details |
| Neutral Glycosphingolipids | A subclass of GLYCOSPHINGOLIPIDS containing one or more sugars within their head group ... more | 4 | 4 | Details |
| NF-kappa B, antagonists & inhibitors | Not Available | 2 | 7 | Details |
| Nicotine, antagonists & inhibitors | Not Available | 2 | 38 | Details |
| Nicotine, metabolism | Not Available | 1 | 31 | Details |
| Nicotinic Acid and Derivatives | Not Available | 8 | 24 | Details |
| Nicotinic Acids | 2-, 3-, or 4-Pyridinecarboxylic acids. Pyridine derivatives substituted with a carboxy ... more | 42 | 171 | Details |
| Nicotinic Agonists | Drugs that bind to and activate nicotinic cholinergic receptors (RECEPTORS, NICOTINIC).... more | 6 | 52 | Details |
| Nicotinic Antagonists | Drugs that bind to nicotinic cholinergic receptors (RECEPTORS, NICOTINIC) and block the... more | 50 | 455 | Details |
| Nifedipine derivatives | Not Available | 0 | 0 | Details |
| Niflumic Acid and Prodrugs | This category is used to create drug-drug interactions. | 2 | 14 | Details |
| Nigella | A plant genus of the family RANUNCULACEAE. | 1 | 3 | Details |
| Nipecotic Acid and Derivatives | Cyclic compounds that include atoms other than carbon in their ring structure. | 1 | 3 | Details |
| Nitrate Vasodilator | Not Available | 3 | 11 | Details |
| Nitrates | Inorganic or organic salts and esters of nitric acid. These compounds contain the NO3- ... more | 4 | 7 | Details |
| Nitrates and Nitrites | Not Available | 5 | 28 | Details |
| Nitric Oxide Donors | A diverse group of agents, with unique chemical structures and biochemical requirements... more | 7 | 25 | Details |
| Nitric Oxide Releasing Agent | Not Available | 1 | 0 | Details |
| Nitric Oxide Synthase | Not Available | 1 | 6 | Details |
| Nitric Oxide Synthase Type II, antagonists & inhibitors | Not Available | 1 | 1 | Details |