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.

Etipirium is an antihaemorrhagic and spasmolytic drug.

FLUDAZONIUM is a topical antiinfective agent.

Mefexamide is a psychostimulant. It was studied in the treatment of depression, asthenia and parkinsonism.

ISOMETAMIDIUM (as a chloride salt) is widely used in tropical countries as an antiprotozoal agent to control animal trypanosomiasis. It is used principally in cattle but also in sheep, goats, buffalos, donkeys, horses, camels and dogs.

Oxpheneridine is a mu opioid receptor agonist that possesses the spasmolytic activity and acts as a narcotic analgesic. However, this compound was not listed as an illegal drug, because of its poor solubility and low doses didn’t produce any addiction. Information about the current use of this drug is not available.

Octafonium (or octaphonium) was used as an antiseptic. Information about the current use of this drug is not available.

Declopramide is an apoptosis inducer. Also, it inhibits NFkappaB activation by inhibition of IkappaBbeta breakdown. In preclinical research, Declopramide demonstrated strong antitumor properties. It had been in phase II clinical trials for the treatment of colorectal cancer. However, this research has been discontinued.

Piprofurol is a benzofuran chalcon derivative. It is a calcium channel blocker. Piprofurol inhibited in a concentration-dependent manner the calcium-induced contractions in isolated potassium depolarized preparations of rat aorta and relaxed the K+-induced contraction of the dog coronary artery and the rabbit basilar artery. Piprofurol also inhibited noradrenaline-induced vascular smooth muscle contractions but the antagonism was clearly noncompetitive and the contractions induced were altered by concentrations two orders of magnitude higher than the concentration inhibiting calcium-induced contractions. Piprofurol exerts a negative inotropic effect on guinea-pig papillary muscle. These effects suggested a potentially anti-ischemic activity. This is confirmed in anaesthetized dogs, where piprofurol reduced the epicardial ST-segment elevation following coronary artery occlusion, and in isolated heart preparations, where it decreased the leakage of LDH during periods of anoxia and reoxygenation. Piprofurol is a coronary vasodilator and antihypertensive agent.