Methastyridone (MK-202), a centrally acting stimulant, was studied with chronic anergic schizophrenics. Information about the current use of this compound is not available.

Furethidine, a pethidine analog was studied as an analgesic agent. This compound is not currently used in medicine and is listed in schedules of the single convention on narcotic drugs of 1961 as amended by the 1972 protocol.

IQUINDAMINE is an antitussive agent.

Mexafylline, a theophylline derivative, is a bronchodilator that has never been marketed.

Cefetrizole is aminocephalosporanic acid derivative with broad antibacterial activity against penicillin-resistant strains patented by Spanish pharmaceutical company Ferrer Internacional S. A.

Mengylate is an antitussive and local anesthetic.

Tiamenidine (also known as HOE 440) is a diazacycloalkene derivative patented by Farbwerke Hoechst A.-G. as 2 alpha-sympathomimetic antihypertensive agents. In preclinical models, tiamenidine induces hypotension and bradycardia in renal hypertensive cats and rats and in normal rats and dogs. Furthermore, Tiamenidine inhibits the liberation of norepinephrine from nerves leading to the heart and suppress sympathetic circulatory reflexes in dogs. In clinical trials, Tiamenidine exerts favor influences on systolic and diastolic blood pressure, and reduces plasma noradrenaline and adrenaline levels and suppresses plasma renin activity. Unfortunately, during the withdrawal of Tiamenidine, there is a rebound of blood pressure and plasma noradrenaline and adrenaline, overshooting baseline levels.

Ternidazole is a nitroimidazolealkanol derivative patented by Societe des usines chimiques Rhone-Poulenc as antitrichomonas agent useful for the treatment of Protozoal infections and other conditions.