Imanixil (also known as HOE-402) was developed as a potent cholesterol-lowering compound, which inhibits VLDL production, and consequently attenuates atherosclerosis development. This drug participated in phase I clinical trial for the treatment of hyperlipidemia, however, this study was discontinued.

Myfadol is a phenacylpiperidine derivative patented by Tanabe Seiyaku Co., Ltd as low molecular weight non-peptide analgesic. Myfadol produces hot-plate analgesia in rodents with minimal side-effects, and when given parenterally in humans produces analgesia to experimentally-produced and postoperative pain.

Acevaltrate is an iridoid found in variable amounts in Valerianaceae and might be among the bioactive compounds which confer anxiolytic properties to the Valeriana species. Acevaltrate inhibited total H⁺/K⁺-ATPase activity (60.7 ± 7.3 %) from rat gastric epithelium. Acevaltrate inhibited Na⁺/K⁺-ATPase with IC₅₀ value of 22.8 uM. Na⁺/K⁺-ATPase might be one of their molecular targets of Acevaltrate in vivo.

Metaglycodol is a tranquilizer.

Niravoline [RU 49679, RU 51599, niravolin], a novel aqueous diuretic with κ-opioid agonistic action. The drug was originally being developed by Hoechst Marion Roussel. Niravoline is a selective agonist of kappa-opioid receptors having potent aquaretic activity. Niravoline was studied with respect to the treatment of brain oedema, heart failure and liver cirrhosis. Niravoline, administered at moderate doses, safely induced a powerful aquaretic effect in patients with cirrhosis and ascites. Moderate doses of niravoline appeared to be a promising pharmacological tool in the treatment of water retention in patients with cirrhosis. The development of niravoline as an aquaretic for the treatment of cirrhosis with ascites and other hyponatraemic disorders has also been halted.

Picenadol is a 4-phenylpiperidine derivative and a racemic mixture whose mixed agonist-antagonist properties are a consequence of the d-isomer being a potent opiate agonist, whereas the I-isomer is an opioid antagonist. In the mouse writhing and rat tail heat tests, the analgesic potency of picenadol is estimated to be 1/3 that of morphine. Picenadol itself has weak antagonist activity, whereas the antagonist potency of the l-isomer is approx. 1/10 that of nalorphine. Picenadol has high affinity for both the mu and delta receptors but a markedly lower affinity for the kappa receptor. Extensive pharmacological investigations show picenadol to have a low potential to produce opiate-like side effects, including a low liability for abuse and physical dependence. Antinociceptive properties of picenadol arise from mu agonist actions of the dextrorotatory isomer and that the levorotatory isomer acts to limit the efficacy of the racemate.

Rifalazil (also known as KRM-1648) is a derivative of the antibiotic rifamycin. This orally administered ansamycin is under evaluation for treatment of various bacterial infections. Rifalazil kills bacterial cells by blocking off the β-subunit in RNA polymerase. This drug was originally developed as a therapeutic agent to replace rifampin in the treatment of tuberculosis. It also showed potential to treat indications caused by chlamydia trachomatis and chlamydia pneumoniae. Furthermore, it has been suggested as a potential drug in the treatment of gastric ulcer disease (which is caused by Helicobacter pylori) and antibiotic-associated colitis. Phase II studies evaluated the efficacy and safety of this drug in patients with chlamydia trachomatis and chlamydia seropositive patients. A phase 3 study was initiated including chlamydia seropositive patients. However, the development of rifalazil was terminated in 2013 due to severe side effects.

Cinoxolone is a derivative of glycyrrhetinic acid. Is is claimed to possess antiulcer properties.

Ibuterol, a prodrug that is rapidly hydrolyzed to form a drug, terbutaline. Terbutaline, a beta-2 adrenergic agent used to treat asthma.