The herbal drugs were dried at 40 ◦C using an air oven. After
drying, the material was reduced in a knife mill (10 mesh outlet
sieve) to a fine powder. The hydroalcoholic extract was obtained by
maceration of the powder in a water:ethanol (30:70, v/v) solvent
system for 72 h and then dried using Spray Dryer (LabPlant®), with
onset temperature of 140 ◦C and under 3 ml/min flow rate. Colloidal
silicon dioxide (Aerosil®200) was used as a drying agent at 20%
(w/w). The drying extract was weighted, protected from light and
stored in closed flasks at room temperature