Befiradol (also known as NLX-112) was initially developed by Pierre Fabre as a selective serotonin-1A receptor agonist for the treatment of cancer pain and neuropathic pain. However, these trials were discontinued. In 2013, the development and commercialization rights were licensed to Neurolixis. Neurolixis studied befiradol in Parkinson’s disease (PD) patients that exhibit dyskinesia. Dyskinesia is a side effect that appears after several years of action Levodopa, a drug that remains the gold standard treatment for PD. In 2019, FDA gave a positive response to Neurolixis’s befiradol to be tested in Phase 2 clinical in Parkinson's disease patients suffering from debilitating levodopa-induced dyskinesia.

Megalomicin is a Micromonospora-produced macrolide antibiotic complex. Megalomicin A component was studied most extensively. It inhibited the ATP-dependent acidification of lysosomes and intra-Golgi transport in vitro. Megalomicin induces a powerful inhibitory effect on HIV-1 replication at nontoxic concentrations by preventing the processing of HIV-1 gp160 envelope protein and the subsequent formation of infectious viral particles.

Naboctate (SP-325) is a synthetic cannabinoid receptor agonist, which has antiemetic, sedative, anxiolytic and anti-glaucoma properties. In a normotensive rabbit model, topically applied naboctate in aqueous solution induced dose-related decreases in intraocular pressure.

Fluotracen (SKF-28,175) is a tricyclic drug which possesses dual antidepressant and antipsychotic activity mediated through blockage of GABA(A) receptors.

Ibuverine was studied as an antispasmodic agent. Information about the current use of this drug is not available.

Talarozole (formerly R115866) is a new highly potent and selective azole derivative, which inhibits cytochrome-P450-dependent all-trans-retinoic acid catabolism by blocking the cytochrome P450 enzyme isoform CYP26, a retinoic acid hydroxylase. It is in clinical development for the treatment of psoriasis and acne. However, no local pharmacokinetic data on the diffusion behaviour of talarozole in the skin itself are available. As topical application might be an interesting alternative to oral therapy because of the reduced systemic side effects. The distribution of talarozole within the skin was investigated: 80% was located in the epidermis, while the remaining 20% was found in the dermis. The epidermal concentration of talarozole achieved after a single topical application was sufficiently high to enable the potential induction of local retinoid-like effects.

9-(N-methyl-L-isoleucine)-cyclosporin A (NIM-811, SDZ 811) is a cyclosporin A analog that is completely devoid of immunosuppressive capacity but exhibits potent and selective anti-human immunodeficiency virus type 1 (HIV-1) activity. NIM-811 interferes at two stages of the viral replication cycle: (i) translocation of the preintegration complex to the nucleus and (ii) production of infectious virus particles. NIM-811 induces a concentration-dependent reduction of HCV RNA in the replicon cells with an IC50 of 0.66 uM at 48 h. NIM-811 blocks the mitochondrial permeability transition induced by calcium and inorganic phosphate. NIM-811 blocks cell killing and prevents in situ mitochondrial inner membrane permeabilization and depolarization during tumor necrosis factor-α–induced apoptosis to cultured rat hepatocytes.Novartis discontinued development of SDZ 811 as an oral therapy for hepatitis C and HIV-1 infections.

Ioglunide is an iodobenzene derivative patented by Laboratoires Andre Guerbet as an oil-based X-ray contrast medium. Iophendylate was commonly used in conventional myelography from the 1940s to the late 1980s before the utilization of computed tomography (CT), magnetic resonance imaging (MRI) and water-soluble contrast agents. Ioglunide, which was never shown to be safe, was initially introduced for use in small amounts for locating spinal tumors. It next appeared on the world scene for high volume, routine use, in diagnosing disc herniations.

Manitimus (FK778) is a synthetic malononitrilamide (MNA) that has been demonstrated to have both both immunosuppressive and anti-proliferative activities. The MNAs inhibit both T-cell and B-cell function by blocking de novo pyrimidine synthesis, through blockade of the pivotal mitochondrial enzyme dihyroorotic acid dehydrogenase, and the inhibition of tyrosine kinase activity. It directly reduced endothelial adhesion molecule up-regulation, inhibited lymphocyte activation, and attenuated lymphocyte-endothelium interactions, critical early steps in graft rejection. Manitimus has been demonstrated to prevent acute allograft rejection in multiple experimental transplant models in rodents, dogs and primates and to be effective in the rat model of chronic renal allograft rejection. It was in clinical studies for the treatment of transplant rejection. Manitimus development has been discontinued.