Generalized Anxiety Disorder, not only results in a disturbed psychological condition, but even daily life with coworkers and family will also be disrupted. Chaihu Jia Longgu Muli Tang (Bupleurum Plus Dragon Bone and Oyster Shell Decoction), a compound Chinese herbal medicine found in "Treatise on Cold Damage", has been used for treating mental disorders with symptoms such as chest distress, irritability, being frightened, etc since the China Han dynasty. In this study, we will observe the efficacy of this formula, in order to provide an evidence-based basis for clinical observation and evaluation of Generalized Anxiety Disorder.