Following 8 days of continuous intake of placebo , nitroglycerin increased FBF by 54 % ( p < 0.05 ) , whereas nitroglycerin increased FBF by 96 % ( p < 0.01 ) following 8 days of continuous intake of nebivolol , and the increase after 8 days of nebivolol was significantly ( p < 0.05 ) more pronounced than after 8 days of placebo .