Survey on input material size, raw material drying temperature, high radial preparation process associated with 40% water and ethanol solvent, time, extraction temperature, etc. Check some quality criteria of Concentrated extract was obtained according to DDVN V Results of selection of medicinal herbs purchased at Na Hang, raw material drying temperature 50oC, raw material size < 3 mm, water solvent, amount of solvent for flooding medicinal herbs, with 3 extraction times, total 3.5 hours, extraction temperature 100oC.