Etazolate (EHT-0202) is a selective, positive GABAA receptor modulator has completed phase II clinical trials in patients with Alzheimer's disease. It is also a selective phosphodiesterase-4 inhibitor that is specific for cAMP. Etazolate showed anxiolytic and antidepressant activity and could be useful in managing post-traumatic stress disorder.

Dexsotalol is an isomer of antiarrhythmic drug d,l-sotalol, but in opposite to drug, it increases the incidence of arrhythmias

Dicarfen hydrochloride is a spasmolytic agent, local anesthetic and antiparkinsonian agent.

Ametantrone (AM) is a synthetic 9,10-anthracenedione bearing two (hydroxyethylamino)ethylamino residues at positions 1 and 4; along with other anthraquinones and anthracyclines, it shares a polycyclic intercalating moiety and charged side chains that stabilize DNA binding. Ametantrone is anticancer drug candidate targeting DNA. Ametantrone is a topoisomerase II inhibitor of the anthrapyrazole family. Ametantrone induces interstrand DNA cross-links in HeLa S3 cells. These cross-links were observed only in cellular system suggesting that metabolism of the drugs is a necessary step leading to DNA cross-linking. Ametantrone appeared to be very well tolerated and easy to handle. A dose-schedule of 135 mg/m2 q 2–3 weeks was recommended for phase II studies in solid tumors.

Etintidine is a potent competitive antagonist of histamine H2-receptors. It has a low level of antiandrogenic activity. Etintidine was being investigated in the treatment of peptic ulcer, however, its development has been discontinued.

Ethidium is a DNA intercalating agent first discovered as and used as a veterenary trypanocide. A bromide salt is commonly used as a fluorescent tag in molecular biology. The fluorescene of ethidium bromide increased 21 fold upon binding to double-stranded RNA, 25 fold upon binding double stranded DNA. Because of the binding to DNA, ethidium bromide is a powerful inhibitor of DNA polymerase.

Secoverine is a selective muscarinic receptor antagonist that was studied as a neurotropic spasmolytic agent. It was shown that the drug had no nicotinolytic or antihistaminic activity, a moderate antisterotonic activity, an inhibiting effect on the noradrenaline uptake mechanism of the vas deferens and marked local anesthetic activity.

Dimoxamine is a memory adjuvant. Dimoxamine hydrochloride has been reported to facilitate the performance of naive rats in a massed trial shuttle box task. At doses that facilitated shuttle box responding, dimoxamine had no effect on unacclimated motor activity of rats nor on the rate of continuous avoidance responding by rats. Dimoxamine has a psychopharmacological profile that is different from other phenylalkylamines such as S-amphetamine and R-DOM. Dimoxamine may prove beneficial in the treatment of individuals having low or deteriorated levels of certain types of associative and psychomotor abilities. Dimoxamine substituted completely for LSD. Dimoxamine can be classified as a partial agonist of 5-HT receptors in sheep umbilical arteries.

SPK-843 is a water-soluble partricin derivative patented by SPA Societa Prodotti Antibiotici S.p.A. and developed by Aparts and Kaken for the potential treatment of systemic fungal infections. In preclinical models, SPK-843 shows in vitro inhibitory activity comparable to or better than that of Amphotericin B against Candida spp., Cryptococcus neoformans, and Aspergillus spp. SPK-843 exhibits dose-dependent efficacy on murine pulmonary aspergillosis models. SPK-843 doses of higher than 1.0 mg/kg of body weight exhibit no renal toxicities and a tendency toward better survival prolongation than the estimated maximum tolerated doses of amphotericin B (Fungizone) and liposomal amphotericin B.

Azepexole (or previously known as B-HT 933), a selective alpha 2-adrenoceptor agonist that was studied for the man with physiological tremor. It was shown that the drug produced sedation compared to placebo but not when compared to pre-treatment values. Some studies also have revealed the anti-tussive and antihypertensive properties of azepexole.