To review and analysis the reference literatures of researching on plastics.Refer to the relevant literatures and summarize

summarize the study progresses of plastics

including the preparation process

film-forming materials

quality control

stability

transdermal absorption and clinical application et al.The ingredients of preparation of plastics are mainly used traditional Chinese medicine

and little used Western-style pharmaceuticals.Some problems need to research

such as single in film-forming materials and inadequate in quality standards.Plastics preparation is simply and easily to use.Therefore

if develop the reasonable quality evaluation methodology

plastics will have wider medical applications.