Patent ID: 6541163
Filing Date: 2003-04-01
Classification: A61K,A61P

Abstract:
A method of processing a mixture of natural plants into a medicated bath powder, comprising the steps of:i mixing and pretreating an effective amount of the natural plants selected from the group consisting of Acanthopanax Bark, Piper Kadsura Ohwi, Tou Feng Cao, Angelica, Green Tangerine Peel, Papaya and Lycopodium clavatum L, Rhododendrons, Artemisia Sieversiana Exhart ex Willol, Chinese Ephedra, Juniperus clavaum L, Myricaria germani-ca Desv, mixtures of Sapium Sebiferum, Roxb, fresh Cinnamomum Camphora, Presl, Pine leaves and Ginger to obtain a crude drug mixture; ii placing the crude drug mixture in a vessel and adding water in an amount 5-15 times the total weight of the crude drug mixture; iii performing the 1st extraction at a temperature from 70Â° C. to the boiling temperature for 0.5-24 hours and obtaining a volatile oil(VO1) portion, a distillate containing the volatile oil(DVO) and a 1st extraction mixture; iv filtering the 1st extraction mixture to obtain the 1st extract and 1st residue; v adding water to the 1st residue in an amount 3-10 times the total weight of the crude drugs; vi performing the 2nd extraction at a temperature from 70Â° C. to the boiling temperature for 0.5-5 hrs and filtering the 2nd extraction mixture to obtain the 2nd extract and 2nd residue; vii adding water to the 2nd residue in an amount 3-10 times the total weight of the crude drugs; viii performing the 3rd extraction at a temperature from 70Â° C. to the boiling temperature for 0.5-5 hrs and filtering the 3rd extraction mixture to obtain the 3rd extract and 3rd residue; ix combining the 1st, 2nd, and 3rd extracts and concentrating the mixed extracts, under vacuum, to form a concentrated drug liquor(CDL); x freeze drying the CDL, under vacuum, to form a solid medicine which is then ground to form a drug powder(DP), or spray dried to form a drug powder(DP); xi subjecting the distillate containing a volatile oil(DVO) to an oil-water separation procedure to get a volatile oil(VO2), xii mixing VO1 and VO2 with the drug powder(DP) to obtain a homogeneous medicated bath powder.