Downward-draining herbs

The action of downward-draining herbs can move the bowels, thus eliminating toxins from the body when Liver and Kidney functions are impaired and they fail to remove toxic substances, such as in cirrhosis of the Liver and renal failure. If a toxic substance has been ingested, the action of downward-draining herbs can assist the body in eliminating it. 

When water metabolism is disturbed, water can accumulate in certain places, such as the hydrothorax and ascites, which can obstruct the Qi. In acute and excess conditions, they should be drained downwards by herbs with a cathartic effect in order to relieve symptoms. 

When downward-draining formulas are used to treat acute abdominal syndromes, such as acute intestinal obstruction, appendicitis, cholecystitis and pancreatitis, it is also important to remember that these herbs are only suitable for certain periods in the whole pathological process of the disease, or certain types of disorder. These formulas should only be prescribed by doctors after modern medical examination. 

In this way, it assists herbs that purge and drain downwards and herbs that descend Qi in the intestines. For applying this strategy, Jie Geng should be used in small dosage. 

In winter or in cold places, cold, bitter, sour and astringent herbs should be prescribed in a relatively low dose. This precaution relates to herbs that clear heat, cool blood and drain downward. In humid places, herbs that transform dampness, activate the Qi movement and promote digestion should be used in relatively large doses because the herbs need extra strength to overcome the dampness. 

Zhi Gan Cao is sweet and enters the Spleen meridian. In formulas that drain downwards, it is often used as corrective assistant and envoy to protect the Stomach from harsh herbs such as Da Huang and Lu Hui. It can also moderate the function of the herbs in the formulas and make the purgative action lasting and stable. 

Chuan Lian Zi is very bitter and cold. It can intensively drain the Liver-fire and direct the Liver-Qi downwards. It is selected in formulas for treating syndromes where Liver-fire flares up and Liver-Qi movement is disturbed. The disorder is manifested as irritability, distension in the hypochondria, insomnia, quick temper, red eyes, headache, red tongue with a yellow coating and a forceful, wiry and rapid pulse. Because Chuan Lian Zi is very bitter and cold, it easily injures the Stomach. This herb should not be used for a long period of time or in large dosage, because it is a toxic herb. Overdose may cause nausea, vomiting, diarrhea, dyspnea and arrhythmia. 

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