There is no contraindication to the use of the two, usually can be brewed together to drink water. It is recommended to consult a doctor before use. Radix et Rhizoma Polygoni Multiflori is used for the treatment of sore throat, carbuncle (carbuncle occurring in the bowels of the intestines and bowels, manifested by fever, pain in the right side of the abdomen, and palpable lump), scrofula (mainly refers to tuberculosis of the cervical lymph nodes), venomous snake bites, bruises, vomiting blood, epistaxis, haematochezia (the appearance of blood in the urine accompanied by a painful sensation), edema, etc. Radix Astragali has the ability to elevate Yang and lift the sinking of the body. Astragalus, with the effects of elevating yang and lifting the sunken organs (elevating yang qi of the body to lift the sunken organs), and supporting poison and muscle growth (discharging poisonous evils to promote muscle growth and wound healing). It is used for treating spontaneous sweating (involuntary sweating during the day, aggravated by sweating with slight movement), deficiency of qi and blood, sores that are difficult to ulcerate and rot, or ulcers that are difficult to converge for a long period of time. Attention, half a lotus and astragalus in water to drink the active ingredients of the drug precipitation is limited, generally can not replace the drug treatment of related diseases. Be cautious of taking half lotus and pregnant women. Where the surface of the solid evil, sores and ulcers at the beginning or after the collapse of heat and toxicity is still prevalent, are not suitable for the use of astragalus. If you feel unwell after drinking water with Astragalus, it is recommended that you stop using it and seek medical attention in time.