The Central venous access page has been updated with information about the relative safety of the use of vasopressors through peripheral IV lines.
Brewer, JM, Puskarich, Michael A, Jones, Alan E. Can Vasopressors Safely Be Administered Through Peripheral Intravenous Catheters Compared With Central Venous Catheters? Annals of Emergency Medicine http://dx.doi.org/10.1016/j.annemergmed.2015.05.026.