Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Vascular responses to clonidine (mean ± 95% confidence interval). Blood flow at the site pretreated with saline (open bar) was significantly lower than at the site pretreated with rauwolscine (filled bar, *P < 0.001) or the previously untreated site (shaded bar, *P = 0.05). Blood flow did not differ significantly between the site of saline iontophoresis (hatched bar) and the site of rauwolscine pretreatment (filled bar).
