Figure 1.

Effect of ethanolic extract of the leaves of Nyctanthes arbortristis on histamine-induced contraction of tracheal smooth muscle. Data are expressed as means ± SEM, n = 7; ^*Control vs. ethanolic extract, ^*P < 0.05, ^***P < 0.001, ^†Ethanolic extract vs. Nω-nitro-l-arginine methyl ester + ethanolic extract, ^†P < 0.05