It contains volatile oil, artemisinin (C2 1H22N2O) and picroside. It is used as medicine, but it is not a real Chinese medicine "Artemisia annua". It is reported that this species has the effects of clearing heat, cooling blood, relieving fever, expelling wind and relieving itching. Used as an antipyretic for yin deficiency and hot flashes, it can also stop night sweats and heatstroke, but it does not contain "artemisinin" and has no antimalarial effect. "Artemisia annua is light blue and yellow" described in ancient cursive scripts such as Compendium of Materia Medica may be this species; The "evil Artemisia" contained in "Disaster Relief Materia Medica" and "Wild Vegetables Record" is also this kind.
Artemisia annua, a traditional Chinese medicine, is the aerial part of the dry aerial part of Artemisia annua in Compositae. Harvesting in bud stage, cutting off the aboveground parts, chopping and drying in the sun. It was called "Qi" (Qin) in ancient times. Clearing heat and relieving summer heat, eliminating steaming and stopping malaria. It can be used for fever due to summer evil, fever due to yin deficiency, night heat and early cooling, bone steaming fatigue, malaria cold and heat, and damp-heat jaundice. This is a cheap antimalarial drug. The stem of Artemisia annua is cylindrical, with branches on the upper part, 30 to 80 cm long and 0.2 to 0.6 cm in diameter; The surface is yellow-green or brown, with longitudinal ridges; Slightly hard and easily broken, with marrow in the middle. Leaves alternate, dark green or brownish green, curly and fragile, complete with deep feathers, lobules oblong or oblong, short hairs on both sides. Unique smell, slightly bitter taste and cool feeling. It is best to be green, leafy and fragrant.