| 简介 |
PURPOSE : Provided is a multilayer patch composed of several drug layers which contain different drug compositions, respectively. Therefore, the patch displays teeth whitening effect within a short period of time. Also, it is harmless to the human body and its active ingredients have thermostability. CONSTITUTION : The multilayer patch is characterized by comprising a supporting layer which prevents drugs from flowing to increase their stability; at least two drug layers in the dry film type; at least one separating layer which separates the drug layers and stabilizes them; and a rare layer which increases the stability of drugs and makes the adhesion of the patch to teeth easy. |
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