Abstract:V-C horizontal diffusion cell and HPLC determination have been utal to study the effect of 1, 2-propanediol and azone on the percutaneous absrption Venenum Bufonis the contents of resibufogenin have been deter-nnned through mouse skin in vitro by HPLC. The results indicate that the contents get increased when 1, 2-propanedi-ol is added and that azone can shorten the lag time of percutaneous abasorption of resibufogenin through mouse skin invitro.