ABSTRACT
OBJECTIVE:To prepare lidocaine liposome gel and to establish its quality control method.METHODS:Li-docaine liposome was prepared using a film dispersion method and the liposome gels were prepared with carbomer-940as base.The concentration of lidocaine was determined by HPLC and the lipsome entrapment efficiency was determined by centrifuga-tion.RESULTS:The linear detection concentration range of lidocaine was2.5～25.0mg/ml(r=0.9996)with average re-covery at(99.83?0.53)%and entrapment efficiency at(82.7?1.83)%.CONCLUSION:This liposome gel is feasible in preparation techniques,stable in quality,convenient and reliable in quality control method.
ABSTRACT
OBJECTIVE:To prepare psoralen liposome gel and to conduct a quan titative investigation about its drug re?lease model in vitro.METHODS:Taken psoralen liposome gel that of the same concentration as the control group,the model of drug release in vitro of the testing group was evaluated by dialyzing method and the stability of its drug release after storage for3weeks at4℃was studied as well.RESULTS:Compared with the control group,the testing group showed significant slow-releasing and long-acting effects and the drug release followed the Higuchi(k=4.67%h -1/2 )diffusion model in the first3hours and a zero order drug release model(k=0.74%h -1 )3hours later;The drug release of the control group followed the Higuchi(k=7.18%h -1/2 )diffusion model of within24hours;The drug release model and the envelop rates of the testing group remained stable within the storage date.CONCLUSION:This preparation is characterized by slow drug releasing in vitro and good stability.