Herbal compatibility describes an understanding of combining medicinals that change the primary herb's function and expand its main treatment scope by increasing efficacy, preventing side effects, and providing comprehensive treatment in complicated cases. This text focuses on the function, application, and compatibility analysis of commonly used medicinals in dual combination. For example, the chapter on ginseng describes its function, application, and compatibility analysis in sequential combination with ginger, aconite, ophiopogon, and hematite. In all, 58 such medicinals are described in association with one other medicinal. Each combination also includes case studies and formula prescriptions. This work will be highly absorbing for students immersed in the acquisition of herbal knowledge.