Atizoram (CP-80633) is a phosphodiesterase IV inhibitor with bronchodilatory and antiinflammatory properties. It was in phase II trials with Pfizer in the US for the treatment of asthma, atopic dermatitis and psoriasis. Development of atizoram has been discontinued in the asthma indication and no recent development has been reported for the other indications. CP-80633 inhibits PDE4 isozymes (human lung IC50 = 1.27 uM) in the absence of effects on PDE1, PDE2, PDE3 and PDE5 isozymes (IC50 > 100 uM). It exhibits no significant selectivity for any single cloned PDE4A, B, C or D isoform.

Sulotroban is a phenoxyalkylcarboxylic acid derivative patented by Boehringer Mannheim G.m.b.H. as thrombocyte aggregation inhibitor and lipid-lowering agent. Sulotroban is the first thromboxane A2 receptor antagonist available for use in man. Its antagonistic profile appeared to be specific and competitive both for platelets and vascular or bronchial smooth muscle receptors. In preclinical models Administered as a single dose of 800 mg, sulotroban antagonized arachidonic acid-induced, collagen-induced, and U-46619-induced platelet aggregation. In clinical trials, Sulotroban shows superior efficacy to placebo in preventing acute problems during, or restenosis after, coronary angioplasty. Chronic dosage with the drug did not lead to any accumulation of its blocking effect on platelet function; the effect of each dose declined to zero 6-7 hours after dosing.

Tebufelone (formerly NE-11740) is a member of the di-tert-butyl-phenol anti-inflammatory agents. Tebufelone is a dual cyclooxygenase (CO)/5-lipoxygenase (LO) inhibitor that has potent analgesic, antipyretic, and anti-inflammatory effects. This drug was studied for the treatment of rheumatic disorders; however, this study was discontinued.

Bemitradine (SC-33643), a diuretic antihypertensive agent that was dropped from the development. Experiments on rodents have revealed this drug was a carcinogen and acted by a hormonally modulated promotional activity in inducing tumors in the liver and mammary glands.

(S)-baclofen (or L-baclofen) is an enantiomer of baclofen, a direct GABA-B receptor mimetic. L-baclofen represents a significant improvement over racemic baclofen in the treatment of trigeminal neuralgia.

Deramciclane is camphor derivative. It is an anxiolytic agent that binds with high affinity to 5-HT2A/2C receptor. Deramciclane showed significant evidence of efficacy for the treatment of generalized anxiety disorder in adult patients. A single dose of deramciclane was rapidly absorbed with peak plasma concentrations being reached after about 3 h. Deramciclane has a half-life of around 27 h. The most commonly reported adverse event was headache. In the in vitro studies deramciclane concentration-dependently inhibited NMDA evoked spreading depression.

Ortataxel (previously known as IDN 5109 or BAY59-8862), a second-generation taxane derivative that was developed as an antitumor agent. Ortataxel binds to and stabilizes tubulin molecules, thereby interfering with the dynamics of microtubule assembly/disassembly. This results in the inhibition of cell division and cellular proliferation. In addition, ortataxel modulates multi-drug resistance mechanisms and may be useful for treating multi-drug resistant tumors that express Pgp, MRP-1, and BCRP. This drug participated in phase II clinical trials in patients with advanced renal cell carcinoma and in patients with Non-Hodgkin's lymphoma. However, these studies were discontinued. Ortataxel was also involved in phase II clinical trials for patients with glioblastoma; however, in a limited number of patients, the drug produced a benefit that lasted for a long time. Besides, ortataxel successfully completed phase II trials in taxane-resistant metastatic breast cancer patients and in taxane-resistant non-small cell lung cancer patients.

MK 0777 is a selective GABAA α2/3 receptor partial agonist, for potential use in the treatment of Schizophrenia, Anxiety Disorder, and Generalized Anxiety Disorder. MK-0777 is functionally selective for the α2 and α3 subunits, with virtually no activity for the α1 and α5 subunits. Therefore, MK-0777 cause less sedation, interact less with alcohol, and exhibit less abuse potential and physical dependence than benzodiazepines. Unfortunately, in clinical trials, MK-0777 has little benefit for cognitive impairments in people with schizophrenia and anxiety disorder.