Flesinoxan is a hypotensive agent and is an effective, high affinity, and selective 5-hydroxytryptamine1A receptor agonist (EC50: 24 nM).

R 59-022 hydrochloride (DKGI-I hydrochloride) is a 5-HT Receptor antagonist that activates protein kinase C (PKC).R 59-022 hydrochloride is a DGK inhibitor (IC50:2.8 µM) that inhibits the phosphorylation of OAG to OAPA.R 59-022 enhances thrombin-induced triglyceride production in platelets and inhibits the production of phosphatidic acid in neutrophils. R 59-022 enhances thrombin-induced diglyceride production in platelets and inhibits phosphatidic acid production in neutrophils.

Azaphen (Pipofezin hydrochloride) is the reuptake of serotonin inhibitor.with antidepressant action and has sedative effects, suggesting antihistamine activity.

Cinitapride (Blaston) is a gastroprokinetic agent. It slows the actions of the muscles to reduce the symptoms of conditions such as acid reflux, delayed gastric emptying, and ulcer dyspepsia. Cinitapride acts as an antagonist of the 5-HT2 receptors and as an agonist of the 5-HT1 and 5-HT4 receptors.

E6801 is a novel selective 5-HT6 receptor agonist with a wide range of biological activities.E6801 can be used in the study of dementia, Parkinson's disease, depression, obesity epilepsy, anxiety, and many other diseases.