Please cite the main reference and the reference for the page that you are using.
oprm_human,
drd2_human,
5ht4r_human,
acm1_human,
acm3_human,
5ht2a_human
Alvimopan,
Clebopride,
Metoclopramide,
Mosapride,
Mepenzolic acid,
Clidinium,
Amitriptyline