Tetrasul is a largely obsolete non-systemic pesticide that was used to control mites and small insects. It has been used in clinical trials studying the treatment of erythematous (type 1) rosacea.

Sematilide (CK-1752) was developed as a novel class III antiarrhythmic agent for the arrhythmia treatment. Sematilide blocks the inward rectifier potassium channel (IK1). The further development of the drug was discontinued.

Proxorphan is a N-substituted 6-oxamorphinane patented by American pharmaceutical company Bristol-Myers Co. as opioid analgesic and antitussive drug. Proxorphan acts as a κ-opioid receptor partial agonist and to a lesser extent as a μ-opioid receptor partial agonist.

Profadol is a pyrrolidine derivative patented in the 1960s by pharmaceutical company Parke-Davis as opioid analgesic. Profadol acts as a mixed agonist-antagonist of the μ-opioid receptor and in preclinical studies, Profadol precipitates abstinence in morphine-dependent monkeys and can reverse pethidine- induced narcosis in nondependent monkeys. In morphine-dependent human subjects, Profadol was also found to pre¬cipitate acute abstinence syndromes, with a potency 40 to 50 times less than that of nalorphine. Profadol, unlike other morphine-antagonists, does not produce nalorphine-like subjective effects. Over a fourfold range of doses, this drug was found to produce subjective effects indistinguishable from those of morphine. Also unlike other morphine-antagonists, profadol is quite active on the "classical" rodent tests for analgesia. It is about 1.3 times as potent as pethidine on the mouse hot-plate test, and about four times as potent on the rat tail-pressure test.

Ilmofosine (1-hexadecylthio; 2-methoxyethyl-racglycero-3-phosphocholine) is a synthetic 1-S-thioether alkyl lysophospholipid derivative with potential antineoplastic activity. In extensive preclinical evaluation against tumor cell lines and in the human tumor colony-forming assay, Ilmofosine was cytotoxic against both leukemias and solid tumors. Ilmofosine was effective against many tumor types, including ovary, non-small cell lung, kidney, and melanoma. Ilmofosine exhibited competitive inhibition of protein kinase C activity with respect to phosphatidyl-serine and inhibited the enzyme activated by diolein.

Trapencaine (pentacaine) is a local anesthetic, used as an antiulcerogenic agent. A proportional involvement of local and systemic effects of pentacaine was found in phenylbutazone-induced and cold-resistant stress-induced lesions, whereas in ethanol-induced lesions oral administration was the only effective way. On the other hand, duodenal lesions and gastric acid secretion were substantially affected by parenteral administration. Pentacaine prevented the depletion of mucus after stress in rats. Intraduodenal administration of pentacaine significantly suppressed both the basal and stimulated gastric secretion.

Oxalinast was developed as an antiasthmatic agent. Information about the current use of this compound is not available.