RESUMEN
OBJECTIVE:To determinate the release rate and in vitro transdermal rate of asarinin in Cancer pain cataplasm. METHODS:Using homemade devices and modified France diffusion,isolated skin of rats as barrier,normal saline as solvent,the content of asarinin was determined by HPLC. Release rate of Cancer pain cataplasm within 20,50,80 and 120 min and transder-mal amount within 2,4,8,12,24 h were investigated,and accumulative release rate and accumulative transdermal rate were cal-culated. RESULTS:Accumulative release rate by 120 min of asarinin in Cancer pain cataplasm was 73.01%;24 h in vitro transder-mal rate was 26.01%,and transdermal kinetics equation of asarinin was Q=5.717 7t1/2-0.385 4(r=0.979). CONCLUSIONS:Cancer pain cataplasm has good release and transdermal performance. Its transdermal kinetics is in line with Higuchi equation.
RESUMEN
Objective:To determine the release and in vitro transdermal rate of tetrahydropalmatine in Xiaoji Aitong cataplasmas in rats. Methods:Using the self-made drug release determination devices and the modified Franz diffusion cells, and the skin of rats as the barrier, the release and in vitro transdermal rate of tetrahydropalmatine in Xiaoji Aitong cataplasmas were detected by HPLC. Re-sults:Tetraydropalmatine within the range of 0. 51-10. 22 μg showed a good linearity (r=0. 999 7), and the average recovery was 98. 49%(RSD=0. 84%,n =9). The release of tetrahydropalmatine in 80 min was 63. 60%, and the skin permeation rate was 23. 15% in 24h. Conclusion:Xiaoji Aitong cataplasmas have good drug release and transdermal performance.