Determination of Effective Time of ShaoGan Capsules by Classical Constant Temperature Acceleration Experiment

To forecast the effective period of paeoniflorin in ShaoGan Capsules,classical constant temperature acceleration experiment was used.The reacting speed K at 25℃ was calculated according to Arrhinius index law as a result of K25=6.7114×10-6 h,The effective time was t0.9=1.79a.