1. The efficacy and function of Artemisia annua is to clear away deficiency and heat, remove bone and steam, relieve summer-heat, stop malaria and relieve jaundice. Can be used for treating yin injury caused by warm pathogen, cold at night, fever due to yin deficiency, bone steaming strain, fever due to summer pathogen, malaria, cold and heat, damp-heat jaundice, etc. Artemisia annua, as a traditional Chinese medicine, comes from the dry aerial parts of Artemisia annua in Compositae. Bitter, pungent and cold, liver meridian and gallbladder meridian.

2. The taboo of Artemisia annua is because of its bitter cold, so patients with spleen and stomach weakness and diarrhea should not use it. The book Materia Medica Xuan Tong records that "those with stomach deficiency dare not vote". When Artemisia annua is used, it is generally decocted with decoction, but it should be noted that it should not be decocted for a long time. In addition, fresh Artemisia annua can also be taken by juicing. For example, artemisinin in Tu Youyou is extracted from Artemisia annua, which is used to treat malaria, cold and heat. It originated from Ge Hong's "Elbow Backup Emergency Prescription" in Jin Dynasty, which records that "Artemisia annua is held in one hand, dipped in two liters of water, squeezed and taken all the time."