Milveterol (also known as GSK159797) was developed as a longer-acting beta2 adrenoceptor agonist for the treatment of respiratory diseases such as asthma and chronic obstructive pulmonary disease (COPD). Milveterol completed phase II clinical trials for asthmatic subjects. However further development of the drug was discontinued.

Icopezil (previously known as CP-118,954) was developed as a selective acetylcholinesterase inhibitor for the treatment of cognitive disorders. Phase II trials of icopezil were underway in Japan and in the USA for the treatment of patients with Alzheimer's disease. However, Pfizer has discontinued these studies.

Atiprosin (AY-28,228), an octahydro-pyrazino-pyrido-indole drug, possesses the alpha-adrenoceptor antagonist activity and exerts antihypertensive effects. Atiprosin has never been marketed

Ondelopran (also known as LY2196044) was developed as orally available opioid receptor antagonist for the treatment of alcoholism. This drug completed clinical trials phase III where was assess its efficacy and safety in the treatment of alcohol dependence in adult outpatients.

Elacridar is an oral bioenhancer that targets multiple drug resistance in tumors. Elacridar is a strong and relatively specific inhibitor of P-gp and BCRP, two main efflux transporters. Development of elacridar is assumed to have been discontinued.

Bedoradrine (also known as KUR-1246 or MN-221), an ultra selective beta 2-adrenoceptor agonist, that participated in phase II clinical trials as an adjunct to standard therapy in the management of patients with acute exacerbation of asthma who did not respond to standard therapy. In addition, the drug was involved in trials for the treatment of preterm labor in obstetrical practice. Bedoradrine is also was studied in phase I of clinical trials for its use for treating chronic obstructive pulmonary disease, however, the efficacy for this disease was uncertain.

FLESINOXAN, a phenylpiperazine derivative, is a selective agonist for 5-HT1A receptors. It is an antidepressant agent which clinical development was stopped.

Anilopam is an opioid analgesic of the benzazepine class. It is an opioid receptor agonist.

Coumazoline is a vasoconstrictor developed as a nasal decongestant by a French corporation Labez. Intravenous administration of the compound to dogs lead to a marked and prolonged drop in the temperature of the gingival mucosa. In rats, coumazoline caused slowing of the dye diffusion on the surface of the skin. The compound did not influence the ciliary motility, as was measured on an isolated guinea pig trachea.

Conorphone (TR5109) is an opioid of mixed agonist-antagonist analgesic class. In animal models, conorphone demonstrated an analgesic activity in the same range as morphine, and lack of addiction liability. Conoprphone was evaluated in a clinical trial for postoperative pain in the oral surgery model and in patients with postepisiotomy pain. The 40 mg dose of conorphone resulted in a significant incidence of side effects such as drowsiness, dizziness, nausea, and vomiting.