Antagonist

 
Alvimopan
Alvimopan is small molecule mu-opioid receptor antagonist.
Mosapride Citrate
Mosapride Citrate is a gastroprokinetic agent, 5-HT4 receptor agonist, and 5-HT3 receptor antagonist.
Rocuronium Bromide
Rocuronium bromide is an aminosteroid non-depolarizing neuromuscular blocker.