Formulation and Evaluation of Betulin Loaded Transdermal Patches

Objectives: To develop and evaluate Transdermal patches of Betulin along with various polymers for controlled release action. Method: Suitable method such as Solvent Casting Technique of Film Casting Technique are used for preparation of Transdermal patch. Result: The prepared Transdermal patches were transparent, smooth, uniform and flexible. The method adopted for preparation of system was found satisfactory. Conclusion: Various formulations were developed by using hydrophilic and hydrophobic polymers like HPMC E5 and EC respectively in single and combinations by solvent evaporation technique with incorporation of penetration enhancer such as dimethylsulfoxide and dibutyl phthalate as plasticizer.  Formulation F7 containing equal ratio of HPMC E5: EC (5:5) showed maximum percentage drug content 95.44%.  A suitable UV Spectroscopy method for the analysis of Betulin was developed. Betulin showed maximum absorption at wave length 215 nm in isotonic phosphate buffer (pH 7.4) solutions. The pre-formulation studies involving description, solubility, melting point, partition coefficient of the drug were found to be comparable with the standard. The Transdermal patch of Betulin was prepared successfully by solvent evaporation method. Transdermal patch of Betulin for Transdermal drug delivery was evaluated. Calibration curve was obtained; Transdermal film was prepared, overcome limitations regarding bioavailability of drug was done. Keywords: Controlled DDS, Transdermal DDS, Betulin, Transdermal Patch, solvent evaporation method.