Review of 5-HT4R ligands: state of art and clinical applications.

This article reviews the medicinal implications of 5-HT(4)R in the peripheral and central nervous systems, based on data from two hundred bibliographic references. An exhaustive compilation of molecules reported to be antagonists or agonists for 5-HT(4)R is presented, including chemical structures, binding properties and pharmacological profiles. In the last part of the review, some key concepts concerning structure-activity relationships are highlighted.