Methylbenactyzium bromide has been used as a spasmolytic for the treatment of gastrointestinal ulcer and gastrointestinal spasms.

Amiphenazole, a respiratory stimulant, can be used parenteral and oral. Nicholas Laboratories marketed it under the trade name Daptazole. It was used to treat chronic respiratory failure, by increasing ventilation and by reduction of the pCO2 in some patients. Increased ventilation was brought about by an increase in tidal volume rather than an increase in respiratory rate. In combination with bemegride, amiphenazole was used as an antidote for barbiturate, glutethimide overdose, as well as poisoning from other sedative drugs. Now, this drug is used very rarely, because it replaced by more effective drugs.

Almitrine, a selective pulmonary vasoconstrictor and a respiratory stimulant that enhances respiration by acting as an agonist of peripheral chemoreceptors located on the carotid bodies. The drug increases arterial oxygen tension while decreasing arterial carbon dioxide tension in patients with chronic obstructive pulmonary disease. In combination with raubasine, it used under the brand, name Duxil for the treatment of age-related cerebral disorders and functional rehabilitation after stroke. In addition, Duxil has been considered as an alternative treatment for dementia, but because of the low methodological quality of included trials and the small number of trials, the obtained data did not provide sufficient evidence to support the routine use of this drug for the disease.

Dihydralazine is a compound with antihypertensive properties and is in clinical trials, where is studied its effect on kidney function and hormones in healthy individuals.

Tolperisone is a centrally acting muscle relaxant first synthesized in 1956 and used in clinical practice since the 1960’s. Tolperisone is an aryl alkyl β-aminoketone with an asymmetric carbon atom α to the carbonyl group. The dextrorotatory enantiomer was reported less effective, however, no detailed analyses of the enantiomers are available. The precise mechanism of action of tolperisone is not fully known. The most prominent effect of tolperisone is its inhibitory action on pathways of spinal reflexes. It suppresses the mono and polysynaptic reflex transmission by both pre-synaptic and post-synaptic mechanisms.

Pronetalol (Pronethalol) is a nonselective beta-adrenoceptor antagonist that is structurally related to propranolol. Pronethalol displays a ∼125–150-fold lower affinity (140–830 nM) for beta-adrenoceptors than propranolol (1.1–5.7 nM). Pronethalol was the first beta-adrenoceptor antagonist used for the treatment of coronary heart disease and cardiac arrhythmias. Pronethalol is a cationic-amphiphilic agent that exhibits membrane-stabilizing effects that are unrelated to beta-adrenoceptor blockade. Pronetalol itself never came into widespread clinical use; it was found to produce thymic tumors in mice, and was discarded in favor of a similar, safer compound, ICI 45,520.

Cefprozil is a 2nd generation cephalosporin that is FDA approved for the treatment of mild to moderate infections of upper respiratory tract, lower respiratory tract, and uncomplicated skin and skin-structure infections. Cefprozil, like the penicillins, is a beta-lactam antibiotic. By binding to specific penicillin-binding proteins (PBPs) located inside the bacterial cell wall, it inhibits the third and last stage of bacterial cell wall synthesis. Common adverse reactions include diarrhea, nausea, vomiting, dizziness, abdominal pain and vaginitis. Nephrotoxicity has been reported following concomitant administration of aminoglycoside antibiotics and cephalosporin antibiotics. Concomitant administration of probenecid doubled the AUC for cefprozil.

Clomiphene (CLOMID®) is a triphenyl ethylene stilbene derivative which is an estrogen agonist or antagonist depending on the target tissue. It is an orally administered, nonsteroidal, ovulatory stimulant. Clomiphene (CLOMID®) is a mixture of two geometric isomers [cis (zuclomiphene) and trans (enclomiphene)] containing between 30% and 50% of the cis-isomer. Clomiphene (CLOMID®) initiates a series of endocrine events culminating in a preovulatory gonadotropin surge and subsequent follicular rupture. The first endocrine event in response to a course of clomiphene therapy is an increase in the release of pituitary gonadotropins. This initiates steroidogenesis and folliculogenesis, resulting in growth of the ovarian follicle and an increase in the circulating level of estradiol. Following ovulation, plasma progesterone and estradiol rise and fall as they would in a normal ovulatory cycle.