Piridronic acid is pyridinyl bisphosphonate. It is the bone calcium metabolism regulator. Piridronic acid was used for the treatment of osteoporosis. It is the human farnesyl pyrophosphate synthase inhibitor. When expressed on an actual or anticipated clinical dose basis for osteoporosis piridronic acid may have a greater potential for inducing gastric damage than do pyridinyl bisphosphonates. Piridronic acid induced significantly more antral damage than risedronate and a greater number of lesions compared to pamidronate and risedronate.

Premafloxacin is an 8-methoxy fluoroquinolone derivative patented by American pharmaceutical company Warner-Lambert Co. as an antibacterial agent. In preclinical studied. Premafloxacin was equivalent to ciprofloxacin, enrofloxacin, and danofloxacin in activity against the gram-negative bacilli but was much more active than the comparison antimicrobial agents (against the staphylococci, streptococci, and anaerobes. Premafloxacin acts as a topoisomerase IV inhibitor with enhanced activity against Staphylococcus aureus.

Deferitrin is a desferrithiocin-derived hexadentate iron chelator, developed by Genzyme Corp. for the treatment of severe iron overload in people who require repeated erythrocyte transfusion for the management of chronic anemia such as beta-thalassemia major. Development of the drug was halted after phase 1/2 clinical trial due to nephrotoxicity.

Aftobetin, also known as ANCA11 and NCE-11, is a novel amyloid–binding compound applied topically in the form of an ophthalmic ointment. Aftobetin offers a promising way for a noninvasive eye-scan to diagnose Alzheimer’s disease early.

Ore Pharmaceuticals developed ORE1001 previously known as MLN-4760 as an orally administered, small molecule compound, for the treatment of inflammatory bowel diseases. ORE1001 is a specific angiotensin-converting enzyme 2 inhibitor. It was shown that ORE1001 markedly decreased tissue myeloperoxidase activity, a well-known marker of inflammation. As a result, ORE1001 was studied as a treatment of gastrointestinal inflammatory conditions. ORE1001 was involved in phase I clinical trial to investigate its safety and activity in subjects with ulcerative colitis. In addition, the drug was studied for NSAID-induced ulcer and obesity. However, all these studies were discontinued.

AZD-7687 is a potent inhibitor of Diacylglycerol O-acyltransferase 1 (DGAT1) which was developed by AstraZeneca for the treatment obesity and type 2 diabetes mellitus. AZD-7687 reached phase I of clinical trials, but was discontinued by unknown reasons.

Saroglitazar, a dual peroxisome proliferator-activated receptor PPAR-α/γ agonist, was an emerging therapeutic option on glycemic and lipid parameters. The Zydus Group has launched LipaglynTM ((Saroglitazar) in India for diabetic dyslipidemia and hypertriglyceridemia with type 2 diabetes mellitus not controlled by statin therapy. In addition, saroglitazar participated in phase II clinical trials that completed enrolment in patients with primary biliary cholangitis and in patients with non-alcoholic steatohepatitis.