OBJECTIVE: To prepare and evaluate a new preparation, Shengfa gels, for treating alopecia .
METHODS: The extraction conditions of capsicum were optimized with the capsaicin content as the index using orthogonal test. The alcohol-extraction methods of Rhizoma Zingiberis were established by the references. With carbomer 940 used as gel matrix and azone and propylene glycol as penetration enhancer, the optimum formulation of Shengfa gels was selected regarding the cumulative amount of capsa...