Figure 2: Effects of aqueous extract (AE) and arrope (Ar) of G. decorticans on the amount of phenol red secretion in percentage in rats. Rats were treated with AE and Ar (250, 500 and 1000 mg/kg). Bromhexine (12 mg/kg) was taken as a positive control. Values were expressed as mean ± SE (n = 6), (*) p < 0.05 compared with the control group.