Cinaciguat acts specifically on oxidized/haem-free soluble guanylyl cyclase by binding to the enzyme's haem pocket and mimicking the nitric-oxide-bound haem group. It is in clinical development for the treatment of acute decompensated heart failure. Cinaciguat had been in phase II clinical trials. However, trials were terminated early because of an excess of hypotension in the cinaciguat arms and subsequent slow enrolment.

Surinabant is a cannabinoid receptor type 1 antagonist developed by Sanofi-Aventis for the treatment for nicotine addiction and obesity. In preclinical models, Surinabant reduced body weight gain, as well as plasma glucose levels and triglycerides. Surinabant also reduced insulin and leptin secretion and increased adiponectin and corticosterone levels in rats. Phase I and phase II studies showed good clinical safety profiles in healthy subjects and in obese subjects, although doses higher than 10mg/day were associated with gastrointestinal events and sleep disorders.

Resatorvid (TAK-242) is a Toll-like receptor 4 (TLR4) antagonist that was designed for the treatment of severe sepsis because of its inhibitory effect on suppressing cytokine levels. This compound suppresses production of inflammatory mediators by inhibiting signal transduction through TLR4. It has also been shown that topical resatorvid, in a UV-induced skin tumorigenesis model, displays photochemopreventive activity, suppressing tumor area and multiplicity. Resatorvid has furthermore shown neuroprotective effects after traumatic brain injury (in a mouse model). Phase III studies evaluating the effects of resatorvid on sepsis have been completed. One such study was ended after it was determined that there was insufficient cytokine suppression in the first stage of the study.

Flutomidate was studied as a hypnotic agent. Information about the current use of this agent is not available.

Setoperone is and antagonist of the brain serotonin 5-HT2 receptor and particular the 5-HT2A isoform. Setoperone is radiolabeled with the radioisotope fluorine-18 and is used in positron emission tomography (PET) in neuroimaging for the study neuropsychiatric disorders, such as schizophrenia and depression.

Becanthone is an antischistosomal agent possesses the ability to inhibit tumors.

Lorpiprazole (brand name Normarex) is a marketed anxiolytic drug of the phenylpiperazine group. It has been described as a serotonin antagonist and reuptake inhibitor (SARI) in the same group as trazodone, nefazodone, and etoperidone.

Bedoradrine (also known as KUR-1246 or MN-221), an ultra selective beta 2-adrenoceptor agonist, that participated in phase II clinical trials as an adjunct to standard therapy in the management of patients with acute exacerbation of asthma who did not respond to standard therapy. In addition, the drug was involved in trials for the treatment of preterm labor in obstetrical practice. Bedoradrine is also was studied in phase I of clinical trials for its use for treating chronic obstructive pulmonary disease, however, the efficacy for this disease was uncertain.

Vestipitant, also known as GW597599, is a neurokinin1 receptor antagonist that was being developed by GlaxoSmithKline for the treatment of postoperative nausea and vomiting. Vestipitant is one of the most potent and selective NK(1) receptor antagonists ever discovered, showing appropriate pharmacokinetic properties and in vivo activity. Its actions support the utility of NK(1) receptor blockade in the alleviation of anxiety and, possibly, depression. It was under development as a potential antiemetic and anxiolytic drug, and as a treatment for tinnitus and insomnia. Vestipitant was shown to improve sleep maintenance in patients with primary insomnia, with no associated next-day cognitive impairment. The effects on wake after sleep onset and total sleep time were maintained following repeated dosing. Vestipitant has anxiolytic properties and a good safety profile. Vestipitant was investigated for potential effect against chronic tinnitus as a stand-alone treatment and in conjunction with a selective serotonin reuptake inhibitor, paroxetine. Although well-tolerated vestipitant, alone or in combination with paroxetine, was not effective in ameliorating tinnitus in this patient group.