Figure 2. Effects of halothane (1%, 2%, and 3%) on (A) isoproterenol-, (B) forskolin-, and (C) dibutyryl cyclic adenosine monophosphate (DBcAMP)-induced vasodilation and a decrease of [Ca2+]iin endothelium-removed strips (n = 6 each). Halothane attenuated isoproterenol-induced vasodilation and a decrease of [Ca2+]iin a dose-dependent manner. In contrast, halothane only slightly enhanced forskolin- and DBcAMP-induced vasodilation and a decrease of [Ca2+]i.