1, Objective To improve the TLC identification of Unguentum tetracycline.

2, Objective To research the preparation of Unguentum Rhizome coptidis and formulate its quality criteria.

3, Results Compared with the original powder, the Unguentum Rhizome coptidis was much lower side effect in clinic.

4, Conclusion Unguentum Rhizome coptidis prepared in the paper could be widely used in clinic.

5, The proposed method can be used to control the quality of the said unguentum.

6, Objective To establish method for determination of Hg content in unguentum hydrargyri aminochloridi.