Objective: To ascertain the best drying method for Shenqi Yiqi Guben tablet. Method: Optimized process respectively with vacuum drying

spray drying and belt drying

inspected the amount of powder

water content

thin layer chromatography

paeoniflorin as the index. Result: The belt drying was the best process. Vacuum of -0.1 MPa

drying temperature 80 ℃

feed rate 5 L

track spead 10 Hz. Conclusion: The optimal drying method is reasonable

the active ingredient is not destroyed

suitable for continuous large-scale production

and can reduce production costs and improve the market competitiveness of this product.