Figure 1: The effects of aqueous extract of C. collinus on rat blood pressure and its interaction with cholinergic and adrenergic agents. Adr = Adrenaline, N Adr = Noradrenaline, Dop = Dopamine, ACh = Acetylcholine, His = Histamine, C.c acq ext = Aqueous extract of C. collinus leaves and Mcg = Microgram