Melarsoprol is an organoarsenic compound that was used for the treatment of sleeping sickness (African trypanosomiasis) since 1949. Melarsoprol is used for the treatment of second-stage infection (involving the central nervous system). It is the only available therapy for second-stage Trypanosoma brucei rhodesiense (East African) infection. Melarsoprol is a prodrug, upon administration it is metabolized to the active form melarsen oxide, which acts by interacting with protein sulfhydryl groups and subsequently inactivating enzymes. A small but adequate amount of the drug penetrates the cerebrospinal fluid, where it is taken up and concentrated by trypanosomes. Due to the high toxicity of the drug, it is administered only in the most dangerous cases. Melarsoprol is not commercially available in the USA, but it is available as treatment IND from CDC.

Carisbamate is an experimental anticonvulsant drug that was under development by Johnson & Johnson Pharmaceutical Research and Development but never marketed. Acute and chronic nonclinical toxicological studies have not revealed any significant abnormalities other than dose-related CNS toxicity. Carisbamate displays high potency in a broad range of rodent seizure and epilepsy models at doses well below those that produce CNS toxicity. The exact mechanism of action is unknown but neuroprotective and antiseizure activity of Carisbamate likely results in part from decreased calcium accumulation through blockade of T-type Ca2+ channels. A phase II clinical trial in the treatment of partial seizures demonstrated that the compound has efficacy in the treatment of partial seizures and a good safety profile. In large multicenter phase III clinical trial for the treatment of partial seizures carisbamate at doses of 300, 800, and 1,600 mg/d was effective as adjunctive therapy for reducing the frequency of partial-onset seizures. The most common adverse events, encountered mainly at daily doses of 1000 mg or more, were CNS-related, including headache, dizziness, somnolence, and nausea. In another phase III clinical trial, carisbamate was not more efficacious in migraine prophylaxis than placebo, but carisbamate monotherapy was well tolerated at doses up to 600 mg per day. Johnson & Johnson received provisional approval by the FDA to market carisbamate under the brand name of Comfyde. However, on August 21, 2009, Johnson & Johnson reported that the FDA had failed to give marketing approval.

Tiapride is a drug that selectively blocks D2 and D3 dopamine receptors in the brain. It is used to treat a variety of neurological and psychiatric disorders including dyskinesia, alcohol withdrawal syndrome, negative symptoms of psychosis, and agitation and aggression in the elderly. A derivative of benzamide, tiapride is chemically and functionally similar to other benzamide antipsychotics such as sulpiride and amisulpride known for their dopamine antagonist effects. Tiapride is marketed under various trade names and is widely available outside of the United States. The most common trade name for tiapride is Tiapridal, which is used throughout Europe, Russia, as well as parts of South America, the Middle East, and North Africa. It is also sold under different names in Italy (Italprid, Sereprile), Japan (Tialaread, Tiaryl, Tiaprim, Tiaprizal), Chile (Sereprid), Germany (Tiaprid, Tiapridex), and China (Tiapride).

Trimetazidine is a medicine, which is used for the treatment of angina pectoris. The drug mechanism of action is explained by its ability to selectively inhibit long-chain 3-ketoacyl coenzyme A thiolase, an enzyme responsible for mitochondrial beta-oxidation of long chain fatty acids. Trimetazidine also increases pyruvate dehydrogenase activity, binds to the mitochondrial membrane, directly inhibits cardiac fibrosis and improves mechanical resistance of the sarcolemma.

Sivelestat is a neutrophil elastase inhibitor approved in Japan and the Republic of Korea for acute lung injury, including acute respiratory distress syndrome in patients with systemic inflammatory response syndrome. Sivelestat is marketed as Elaspol in Japan. Sivelestat competitively inhibited human neutrophil elastase (IC50 = 0.044 uM, Ki = 0.2 uM). It also inhibited leukocyte elastase obtained from rabbit, rat, hamster and mouse.

Fasudil is a potent Rho kinase inhibitor, which was developed by Asahi Kasei. The drug is used in Asia for the prevention of cerebral vasospasm in patients with subarachnoid hemorrhage.

TIANEPTINE, a tricyclic antidepressant, is a drug used for the treatment of the major depressive disorder. It was discovered by The French Society of Medical Research in the 1980s. Unlike other tricyclic antidepressants, TIANEPTINE is a selective serotonin reuptake enhancer with minimal effects on norepinephrine and dopamine uptake. Also, it is a full agonist at the mu-opioid and delta-opioid receptors with no effect at the kappa-opioid receptors. Selective mu-opioid agonists typically induce euphoria, which may contribute to TIANEPTINE's antidepressant effect. It is marketed as Coaxil/Stablon in many European countries, but it is not available in the US.

Broxuridine (5-Bromo-2-deoxyuridine, BrdU) is a thymidine analogue that is incorporated into replicating DNA. BrdU taken up by cells is phosphorylated and incorporated into DNA in place of dT. Although originally designed as a chemotherapeutic agent, sublethal concentrations of BrdU have long been known to alter the growth and phenotype of a wide range of cell types. The most popular use of BrdU is as a tracer of DNA synthesis. The other well-known use of BrdU is as a DNA photosensitizer. BrdU substitution of dT in DNA sensitizes it to near-UV light, and cells with BrdU-substituted DNA cannot survive after exposure to near-UV light. BUdR has side effects on cell functions. Cell growth can be inhibited, normal development of differentiating systems be perturbed, activities of specific enzymes be reduced. Mutagenic effects of BUdR are interpreted as reflections of a mispairing of BUdR in its rare enol form. Effects of BUdR which can be reversed by addition of thymidine are not likely to be mutagenic. As another mechanism of action of BUdR has been suggested that incorporation of BUdR into DNA alters the pattern of transcription.

Formestane (trade name Lentaron) is a type I, steroidal, selective aromatase inhibitor used in the treatment of estrogen receptor-positive breast cancer in postmenopausal women. Formestane has poor oral bioavailability and thus must be administered fortnightly (bi-weekly) by intramuscular injection. Formestane is a second generation, irreversible, steroidal aromatase inhibitor. It inhibits the aromatase enzyme responsible for converting androgens to estrogens, thereby preventing estrogen production. Estrogen-sensitive breast cancer cells depend on estrogen for viability. Thus removal of estrogen from the body can be an effective treatment for hormone-sensitive breast cancers. Common side effects associated with the use of an aromatase inhibitor include hot flashes, joint pain, weakness, fatigue, mood changes, depression, high blood pressure, swelling of the arms/legs, and headache. Aromatase inhibitors may also decrease bone mineral density, which may lead to osteoporosis and an increase in fractures in susceptible patients. Formestane was the first selective aromatase inhibitor to be developed as a prescription drug, first appearing in Europe during the mid-1990s under the Lentaron Depot brand name. With the emergence of newer and more effective aromatase inhibitors, however, formestane soon lost market presence at a rapid rate. Most of the initial Lentaron preparations have since been discontinued. Currently, formestane (categorized as an anti-estrogenic agent) is prohibited from use in sports in accordance with the regulations of the World Anti-Doping Agency. The drug remains available today, but only in a small number of nations. This includes Austria, Brazil, Czech Republic, Hong Kong, and Turkey.

Brivudine (trade names Zostex, Mevir, Brivir, among others) is an antiviral drug used in the treatment of herpes zoster ("shingles"). Brivudine is an analog of the nucleoside thymidine. The active compound is brivudine 5'-triphosphate, which is formed in subsequent phosphorylations by viral (but not human) thymidine kinase and presumably by the nucleoside-diphosphate kinase. Brivudine 5'-triphosphate works because it is incorporated into the viral DNA, but then blocks the action of DNA polymerases, thus inhibiting viral replication. Brivudine is used for the treatment of herpes zoster in adult patients. It is taken orally once daily, in contrast to aciclovir, valaciclovir, and other antivirals. A study has found that it is more effective than aciclovir, but this has been disputed because of a possible conflict of interest on part of the study authors. The drug is contraindicated in patients undergoing immunosuppression (for example because of an organ transplant) or cancer therapy, especially with fluorouracil (5-FU) and chemically related (pro)drugs such as capecitabine and tegafur, as well as the antimycotic drug flucytosine, which is also related to 5-FU. It has not been proven to be safe for children and pregnant or breastfeeding women. The drug is generally well tolerated. The only common side effect is nausea (in 2% of patients). Less common side effects (<1%) include a headache, increased or lowered blood cell counts (granulocytopenia, anemia, lymphocytosis, monocytosis), increased liver enzymes, and allergic reactions. Brivudine is approved for use in a number of European countries including Austria, Belgium, Germany, Greece, Italy, Portugal, Spain, and Switzerland.