| Hexamethonium Compounds | Compounds containing the hexamethylenebis(trimethylammonium) cation. Members of this gr... more | 1 | 2 | Details |
| Hexanols | Isomeric forms and derivatives of hexanol (C6H11OH). | 13 | 38 | Details |
| Hexokinase, antagonists & inhibitors | Not Available | 1 | 1 | Details |
| Hexosamines | A class of organic compounds composed of carbon, hydrogen, and oxygen in a ratio of Cn(... more | 18 | 49 | Details |
| Hexosaminidases | Enzymes that catalyze the hydrolysis of N-acylhexosamine residues in N-acylhexosamides.... more | 1 | 2 | Details |
| Hexosediphosphates | A class of organic compounds composed of carbon, hydrogen, and oxygen in a ratio of Cn(... more | 1 | 4 | Details |
| Hexosephosphates | A class of organic compounds composed of carbon, hydrogen, and oxygen in a ratio of Cn(... more | 8 | 23 | Details |
| Hexoses | A class of organic compounds composed of carbon, hydrogen, and oxygen in a ratio of Cn(... more | 17 | 162 | Details |
| Hexuronic Acids | Term used to designate tetrahydroxy aldehydic acids obtained by oxidation of hexose sug... more | 1 | 1 | Details |
| High-Ceiling Diuretics | Not Available | 9 | 45 | Details |
| High-Ceiling Diuretics and Potassium-Sparing Agents | Not Available | 2 | 25 | Details |
| High-risk opioids | Strong or potent agonists of the opioid receptors, which include various types of phena... more | 11 | 103 | Details |
| Highest Risk QTc-Prolonging Agents | Drugs demonstrating a high risk of QTc interval prolongation in animal or human studies. | 51 | 684 | Details |
| Hippocastanaceae | A plant family of the order Sapindales, subclass Rosidae, class Magnoliopsida. | 1 | 0 | Details |
| Hippurates | Salts and esters of hippuric acid. | 2 | 12 | Details |
| Histamine Agents | Drugs used for their actions on histaminergic systems. Included are drugs that act at h... more | 91 | 434 | Details |
| Histamine Agonists | Drugs that bind to and activate histamine receptors. Although they have been suggested ... more | 5 | 19 | Details |
| Histamine Antagonists | Drugs that bind to but do not activate histamine receptors, thereby blocking the action... more | 128 | 1168 | Details |
| Histamine H1 Antagonists | Drugs that selectively bind to but do not activate histamine H1 receptors, thereby bloc... more | 101 | 1078 | Details |
| Histamine H1 Antagonists, Non-Sedating | A class of non-sedating drugs that bind to but do not activate histamine receptors (DRU... more | 14 | 108 | Details |
| Histamine H1 Inhibitors | Not Available | 4 | 29 | Details |
| Histamine H1 Inverse Agonists | Not Available | 1 | 3 | Details |
| Histamine H2 Antagonists | Drugs that selectively bind to but do not activate histamine H2 receptors, thereby bloc... more | 20 | 206 | Details |
| Histamine H3 Antagonists | Not Available | 6 | 34 | Details |
| Histamine N-Methyltransferase, antagonists & inhibitors | Not Available | 1 | 1 | Details |