| Ethers of Tropine or Tropine Derivatives | Not Available | 2 | 6 | Details |
| Ethers, Chemically Close to Antihistamines | Not Available | 2 | 13 | Details |
| Ethers, Cyclic | Compounds of the general formula R-O-R arranged in a ring or crown formation. | 19 | 55 | Details |
| Ethinyl Estradiol | A semisynthetic alkylated ESTRADIOL with a 17-alpha-ethinyl substitution. It has high e... more | 2 | 5 | Details |
| Ethyl Ethers | Organic compounds having ethyl groups bound to an oxygen atom | 5 | 23 | Details |
| Ethylamines | Derivatives of ethylamine (the structural formula CH3CH2NH2). | 83 | 334 | Details |
| Ethylene Glycols | An ethylene compound with two hydroxy groups (-OH) located on adjacent carbons. They ar... more | 53 | 58 | Details |
| Ethylene Imines | Not Available | 3 | 4 | Details |
| Ethylenediamine Derivatives | Not Available | 1 | 3 | Details |
| Ethylenediamines | Derivatives of ethylenediamine (the structural formula NH2CH2CH2NH2). | 11 | 40 | Details |
| Ethylmercury Compounds | Organic mercury compounds in which the mercury is attached to an ethyl group. | 2 | 8 | Details |
| Eucalyptus | Not Available | 0 | 0 | Details |
| Eukaryota | One of the three domains of life (the others being BACTERIA and ARCHAEA), also called E... more | 54 | 52 | Details |
| Excipients | Usually inert substances added to a prescription in order to provide suitable consisten... more | 14 | 7 | Details |
| Excitatory Amino Acid Agents | Drugs used for their actions on any aspect of excitatory amino acid neurotransmitter sy... more | 18 | 141 | Details |
| Excitatory Amino Acid Agonists | Drugs that bind to and activate excitatory amino acid receptors. | 2 | 27 | Details |
| Excitatory Amino Acid Antagonists | Drugs that bind to but do not activate excitatory amino acid receptors, thereby blockin... more | 18 | 146 | Details |
| Excitatory Amino Acids | Endogenous amino acids released by neurons as excitatory neurotransmitters. Glutamic ac... more | 12 | 95 | Details |
| Exopeptidases | A sub-class of PEPTIDE HYDROLASES that act only near the ends of polypeptide chains. | 3 | 1 | Details |
| Expectorants | Agents that increase mucous excretion. Mucolytic agents, that is drugs that liquefy muc... more | 31 | 41 | Details |
| Experimental Unapproved Treatments for COVID-19 | Drugs that are being investigated as potential treatment options for coronavirus diseas... more | 116 | 591 | Details |
| Explosive Agents | Substances that are energetically unstable and can produce a sudden expansion of the ma... more | 4 | 9 | Details |
| Extended-spectrum beta-lactamase inhibitors | Not Available | 1 | 3 | Details |
| Extended-spectrum Penicillins | Not Available | 1 | 6 | Details |
| Extracellular Matrix Proteins | Macromolecular organic compounds that contain carbon, hydrogen, oxygen, nitrogen, and u... more | 9 | 8 | Details |