Pipoxizine is the antihistamine agent and antiserotonin agent. It was used as antiarrhythmic and bronchodilator.

Berlafenone (previously known as GK 23 G), a sodium channel antagonist was studied as a class Ic antiarrhythmic agent, but development has been discontinued.

Dimetholizine has antihypertensive activity. It is an antihistaminic agent too. Histamine H1 receptor was predicted as a primary target for dimetholizine. Moreover, it was found to bind the Dopamine D2 and 5-HT1A receptors. Dimetholizine was predicted to be alpha1D-Adrenergic blocker.

Icotidine (also known as SKF 93319) was developed as histamine H1- and H2-receptor antagonist and possessed antinociception properties. Due to its antagonist activity, was suggested that compound could have therapeutic in some inflammatory skin diseases such as the urticarias and mastocytosis.

Mefenidil has been reported to be a selective cerebral vasodilator. It significantly increased cerebral blood flow (without stimulation of O2 uptake) and lowered cerebral vascular resistance without having significant effects in other circulatory regions. Increase in cerebral blood flow is not mediated via the beta-adrenergic receptor as the effect was not blocked by propranolol. However, the clinical usefulness of mefenidil as a cerebral vasodilator may be limited by the accompanying arterial hypotension due to systemic vasodilation, which was most prominent in heart and gut.

Pyroxamine (also known as AHR 224) is benzhydryl ethers of 3-pyrrolidinol patented by A. H. Robins Co., Inc. as antihistamine with bronchodilation activity. In preclinical studies, Pyroxamine shows moderate inhibition of histamine-induced ulceration in guinea pigs

Deditonium is an antibacterial compound developed by the French company Centre de Recherches des Laboratoires Diamant. Deditonium is a quaternary ammonium derivative and has a bacteriostatic action at concentrations ranging from 1x10-6 to 5x10-4 M. Gram-positive cocci were found to be the most sensitive as well as many enterobacteria.

Etipirium is an antihaemorrhagic and spasmolytic drug.

Bromadoline is a selective agonist of a μ-opioid receptor with potent analgesic activity developed by the Upjohn company in the 1970s for pain management.