What are the benefits and effects of Fuling Guizhi Gancao Dazao Decoction?

The Fuling Guizhi Gancao Dazao Decoction is efficacious in warming and invigorating the heart-yang, transforming qi, and promoting diuresis. It is comprised of Fuling, Guizhi, Gancao, and Dazao, and this decoction acts swiftly and is easy to prepare. The preparation method involves using 1 liter of Ganlan water. First, boil Fuling until reduced to 800 milliliters, then add the remaining herbs and boil until 300 milliliters remain, before filtering out the dregs. The dosage and administration are 100 milliliters taken warm, three times a day. The Ganlan water used in this decoction is also known as "Lao water." Ganlan water is prepared by placing water in a basin and repeatedly scooping it up and pouring it down with a ladle until countless water droplets are seen rolling on the surface of the water, which is then ready for decocting herbs. The reason why Ganlan water is used as the solvent in the Fuling Guizhi Gancao Dazao Decoction is that it can transform qi, promote diuresis, dispel cold properties of water, and does not exacerbate water-related pathogens. In the decoction, Fuling promotes diuresis, eliminates dampness, strengthens the spleen, and calms the heart, playing a role in tranquilizing the mind; Guizhi, with its pungent and warm nature, supports yang, calms upward rushing qi, promotes sweating and muscle relaxation, warms the meridians, and unblocks the pulse; Gancao nourishes qi and tonifies deficiencies, and in combination with Guizhi and Dazao, it strengthens the spleen and stomach, nourishes qi and promotes the production of body fluids. After these four herbs are decocted with Ganlan water, they exhibit the effects of warming and invigorating the heart-yang, transforming qi, and promoting diuresis.