other alpha-2 adrenergic agonists ( naphazoline , guanabenz , ergometrine , alpha-methylnorepinephrine ) were also effective antidiarrheal agents , but alpha-1 ( methoxamine , phenylephrine ) or beta ( isoproterenol ) adrenergic agonists were not .
C1373110
alpha-2 adrenergic agonists
C0018312
guanabenz