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@#Platelet is an important component of human blood, which plays a key role in the physiological and pathological processes. Recently, novel drug delivery system based on platelet and platelet membrane bionics attracted much attention. Compared to the traditional drug carriers, platelet and platelet membrane-based biomimetic drug delivery system has great performances in biocompatibility, longer circulation and stronger ability of targeting. This review presented the features, classifications, drug-loading and applications of platelet and platelet membrane-based biomimetic drug delivery systems, promoting their development and application in the future.
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<p><b>OBJECTIVE</b>To study effect of alcohol concentration in water extraction and alcohol precipitation on the preparation of effervescent tablets of Banlangen.</p><p><b>METHOD</b>Effects of different concentrations of alcohol precipitation on the Banlangen extract rate, metastasis rate of index components, extract properties of powder, preparation process were investigated, respectively.</p><p><b>RESULT</b>Alcohol concentration on the Banlangen extract rate, metastasis rate of adenosine, extract the amount of saturated moisture, effervescent disintegration time of no significant impact, but spray drying process, dry granulation process.</p><p><b>CONCLUSION</b>Alcohol concentration has a significant effect on the preparation of effervescent tablets of Banlangen in the process of water extraction and alcohol precipitation, It suggest that the choice of concentration of alcohol precipitation should be based on experimental purposes, the entire preparation process of the system test results.</p>