Cocaethylene is the ethyl ester of benzoylecgonine. Cocaethylene is formed in the liver after concurrent use of cocaine and alcohol. Cocaethylene works by blocking the dopamine transporter on dopaminergic presynaptic nerve terminals in the brain. It increases dopamine synaptic content, provoking enhanced postsynaptic receptor stimulation, resulting in euphoria, reinforcement, and self-administration. Compared to cocaine, which is a methyl ether of benzoylecgonine, cocaethylene has three to five times larger half-life in plasma. Cocaethylene is associated with seizures, liver damage and compromised the functioning of the immune system. It carries an 18-25 fold increase in risk for immediate death compared to cocaine alone.

Atliprofen (previously known as IDPH 8261), a nonsteroidal anti-inflammatory cyclooxygenase inhibitor was developed as an anti-inflammatory drug. Low toxicity and high efficacy allowed making this compound a potentially useful therapeutic agent. IDPH 8261 participated in the clinical trial phase III in India for the treatment of rheumatic disorders However, information about the further development of the drug is not available.

Ataprost (also known as ONO-41483; OP-41483), an epoprostenol agonist, participated in phase II clinical trials in Japan for the treatment patients with heart failure and myocardial ischemia. However, these trials were discontinued.

Ascorbyl gamolenate, an aldehyde reductase inhibitor, participated in phase-I clinical trials for Diabetic neuropathies in the United Kingdom but these studies were discontinued.

Aclantate is a nonsteroidal anti-inflammatory drug.

Atrasentan (ABT-627, A-127722) is a selective endothelin A receptor antagonist. Atrasentan is being developed by AbbVie as an oral treatment for diabetic nephropathies.Abbott Laboratories was conducting clinical development of atrasentan for the treatment of certain cancers, including phase II trials for prostate cancer. However, no recent development has been reported for cancer indications and development is presumed to be discontinued.

Peradoxime is an antihypertensive agent. In normal animals, 37-48% of the radioactivity from an oral dose of labeled peradoxime or parenteral dose was excreted in the urine, and 48-50% in the feces. Biliary and urinary metabolites of peradoxime were principally found as conjugates with glucuronic acid.

IPROXAMINE is a peripheral vasodilator.

S-(+)-niguldipine is a more active enantiomer and is a selective antagonist for the and α1A-adrenoceptor. In addition, it can be used for discriminating of alpha 1A- from alpha 1B-adrenoceptors. There were made attempts to investigate the antidepressant action of S-(+)-niguldipine on rats, but that studies were unsuccessful.

Mercuderamide is a mercurial diuretic. It inhibits both Na+-K+-ATPase and cyclic 3',5'-AMP-dependent protein kinase.