| Neurotoxins | Toxic substances from microorganisms, plants or animals that interfere with the functio... more | 6 | 8 | Details |
| Neurotransmitter Agents | Agents affecting the activity of neurotransmitter systems. | 611 | 3538 | Details |
| Neurotransmitter Uptake Inhibitors | Drugs that inhibit the transport of neurotransmitters into axon terminals or into stora... more | 58 | 620 | Details |
| Neutral Glycosphingolipids | A subclass of GLYCOSPHINGOLIPIDS containing one or more sugars within their head group ... more | 4 | 0 | Details |
| NF-kappa B, antagonists & inhibitors | Not Available | 1 | 1 | Details |
| Nicotine, antagonists & inhibitors | Not Available | 2 | 36 | Details |
| Nicotine, metabolism | Not Available | 0 | 0 | Details |
| Nicotinic Acid and Derivatives | Not Available | 8 | 18 | Details |
| Nicotinic Acids | 2-, 3-, or 4-Pyridinecarboxylic acids. Pyridine derivatives substituted with a carboxy ... more | 35 | 116 | Details |
| Nicotinic Agonists | Drugs that bind to and activate nicotinic cholinergic receptors (RECEPTORS, NICOTINIC).... more | 6 | 51 | Details |
| Nicotinic Antagonists | Drugs that bind to nicotinic cholinergic receptors (RECEPTORS, NICOTINIC) and block the... more | 48 | 406 | Details |
| Nifedipine derivatives | Not Available | 0 | 0 | Details |
| Niflumic Acid and Prodrugs | This category is used to create drug-drug interactions. | 2 | 14 | 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 | 8 | Details |
| Nitrates | Inorganic or organic salts and esters of nitric acid. These compounds contain the NO3- ... more | 4 | 3 | Details |
| Nitrates and Nitrites | Not Available | 5 | 18 | Details |
| Nitric Oxide Donors | A diverse group of agents, with unique chemical structures and biochemical requirements... more | 7 | 11 | Details |
| Nitric Oxide Synthase | Not Available | 1 | 6 | Details |
| Nitric Oxide Synthase, antagonists & inhibitors | Not Available | 13 | 21 | Details |
| Nitric Oxide, antagonists & inhibitors | Not Available | 0 | 0 | Details |
| Nitriles | Organic compounds containing the -CN radical. The concept is distinguished from CYANIDE... more | 22 | 72 | Details |
| Nitrites | Salts of nitrous acid or compounds containing the group NO2-. The inorganic nitrites of... more | 2 | 5 | Details |
| Nitro Compounds | Compounds having the nitro group, -NO2, attached to carbon. When attached to nitrogen t... more | 51 | 115 | Details |
| Nitrobenzenes | BENZENE derivatives carrying nitro group substituents. | 9 | 20 | Details |