GSK-2330672 (linerixibat) is a nonabsorbable apical sodium-dependent bile acid transporter. This compound is being evaluated for treatment in patients with type 2 diabetes. In animal models of type 2 diabetes, it lowers glucose levels. GSK-2330672 also improves glucose and lipids in diabetes patients, but a high incidence of gastrointestinal adverse events (such as diarrhea) has been reported. Efficacy of GSK-2330672 in patients with primary biliary cholangitis that develop itch (pruritus) has also been examined. However, long-term used might be problematic because of the gastrointestinal adverse events.

4-Methylaminorex is a stimulant drug, synthesized by McNeil Laboratories as an appetite suppressant. Its development was discontinued in favor of aminorex, which was withdrawn from the market when its use was linked with the development of fatal pulmonary hypertension. 4-Methylaminorex exists as four stereoisomers (±)-cis and (±)-trans. In neurochemical and behavioral studies trans-4S,5S-isomer was the most potent isomer followed by the equally effective cis-isomers, whereas trans-4R,5R-isomer was relatively ineffective. The racemic cis-4-methylaminorex has been reported to be the most frequently encountered form in illicit samples The drug is known under street names "U4Euh" or "Ice", is used a a stimulant and is classified as a schedule I substance. Neurochemical data suggest that behavioral effects of the isomers of 4-methylaminorex are related to drug-induced dopamine release.

Nuciferine is an aporphine alkaloid extracted from lotus leaves, which is a raw material in Chinese medicinal herb for weight loss. Nuciferine was studied as an anti-tumor agent against human neuroblastoma and mouse colorectal cancer, through inhibiting the PI3K-AKT signaling pathways and IL-1 levels. In addition, was suggested, that nuciferine had atypical antipsychotic-like actions. Nuciferine was an antagonist at 5-HT2A, 5-HT2C, and 5-HT2B, an inverse agonist at 5-HT7, a partial agonist at D2, D5 and 5-HT6, an agonist at 5-HT1A and D4 receptors, and inhibited the dopamine transporter. In addition, was shown, that that nuciferine had a therapeutic effect on respiratory diseases associated with the aberrant contraction of airway smooth muscles and/or bronchospasm through the blockade of voltage-dependent L-type Ca2+ channels and/or nonselective cation channels.