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Preparation of Total Alkaloids of Strychni Semen-Total Qlucosides of Paeony Gel and Its Transdermal Absorption

??OBJECTIVE To prepare the total alkaloids of Strychni Semen(TASS)-total glucosides of Paeony(TGP) gel and study its in vitro transdermal absorption of two alkaloids(strychnine and brucine) after the combination of TASS and TGP. METHODS The excised abdominal skin of mice was used as the permeation model. Utilizing the modified Franz diffusion cell, the suitable receiving solution was elected to test the content of two alkaloids by HPLC, and thus the percutaneous rates and permeability coefficients were obtained. RESULTS 20% Ethanol-normal saline was taken as receiving solution. With combination use of TASS and TGP, the penetration quantities of strychnine and brucine in different (1:1,1:3,1:6) gels were felled by 22.7%,48.4%,69.1% and 5.93%,23.8%,80.7% after 24 h. And with the increase of compatibility proportion, infiltration rate and skin retention rate also gradually reduced. CONCLUSION The compatibility of TASS and TGP drug delivery can reduce the toxic ingredients through capacity, there is a “attenuated” effect, the best ratio is 1:6.