Reed root is the underground stem of Gramineae perennial grass reed. Sweet and cold in nature. Enter the lung and stomach meridians. Has the effects of clearing away heat, promoting fluid production, relieving vexation and relieving vomiting.

The rhizome of cogongrass is the rhizome of the perennial herb cogongrass. Sweet and cold in nature. Enter lung, stomach and bladder meridian. It has the effects of cooling blood, stopping bleeding, clearing away heat and diuresis, and clearing away lung and stomach heat.

The medicine has the effects of clearing away heat and promoting diuresis.

Compatibility mechanism: reed root tastes sweet, cold and light, and enters the lung and stomach meridians. Han Gan is light in weight, clearing away heat and promoting fluid production, and can promote lung and stomach qi. Clearing lung heat can moisten dryness and relieve cough, but it can cure lung heat dry cough, wind heat cough, lung abscess and expectoration. Clearing lung, promoting fluid production, relieving vomiting and vexation, treating fever and thirst, and vomiting due to stomach heat; Clearing the lung can induce diuresis by adjusting the passage of water, and treat short and red urine, hot shower and astringent pain.

Cogongrass rhizome tastes sweet, cold and light, and enters lung, stomach and bladder meridian. Sweet and fluid-producing, cold and blood-cooling, light ascending and descending, can not only clear lung and stomach heat, but also cool blood and fluid-producing, and can enter the bladder to facilitate water and conduct heat downwards, so it has the functions of cooling blood, stopping bleeding, clearing heat and diuresis. It is suitable for all kinds of blood-heat bleeding, especially hematuria. It can also be used for treating cold stranguria, jaundice, edema, dysuria, fever, polydipsia, vomiting due to stomach heat, and cough due to lung heat.

Rhizoma Imperatae is clear in the interior, while Rhizoma Phragmitis is clear in the exterior. The two drugs are compatible, one is clear and the other is clear, which is especially suitable for cough and asthma due to lung heat and clearing rash toxin. Secondly, the two herbs are sweet, cold and moist, which can clear lung and stomach heat; Third, cogongrass rhizome is cold and cannot clear heat, so it can cool blood and produce fluid, and it can also enter the bladder for diuresis and conduct heat downwards. Reed root is cold, so it can regulate qi, and is often used to clear lung and stomach qi. The combination of the two drugs in one breath and one blood has the effects of clearing both qi and blood, sweating and relieving exterior syndrome, clearing away heat and diuresis, promoting fluid production and quenching thirst.

clinical application

1. Wind-heat cold. It is especially suitable for patients with exterior syndrome of wind-heat and thirst. It is often used with honeysuckle, forsythia and mint.

2. High fever, polydipsia, stomach fever, body fluid injury, vomiting due to adverse qi flow, etc. Can be applied.

3. Edema, stranguria and hematuria are compatible with talc, Yunnan wheat and Akebia stem.

Modern clinic is often used for colds, upper respiratory tract infections, bronchopneumonia, bronchial asthma, lobar pneumonia, viral pneumonia, epidemic hemorrhagic fever, acute glomerulonephritis, urinary tract infections and so on.

Modern research on rhizome of imperata rhizome has antibacterial, antiviral, anti-inflammatory exudation, diuretic and analgesic effects; It also has the effects of shortening coagulation time and bleeding time and relieving alcoholism. Reed has sedative, analgesic, antihypertensive, hypoglycemic, antioxidant and antipyretic effects.

Usage and dosage: cogongrass rhizome, fresh 20~60g, dry10 ~15g; Fresh reed rhizome 30g, dry reed rhizome 10~ 15g. Decoct with water.

Pay attention to the use of spleen and stomach deficiency and cold.

It is said that the compatibility of cogongrass rhizome and Phragmites communis stems from the experience in "Shi Jin Mo Dui Yao", and Shi Lao thinks that it can be applied regardless of exogenous fever, internal injury fever or unexplained fever. Zhang Xichun believes that all fresh grass roots can be replaced by fresh reed roots, indicating that their functions are similar and can be used interchangeably.