[Nature and flavor and meridians entered] Bitter, slightly pungent, and cold; enters the heart, lung, and spleen meridians.
 【Effects and characteristics】 Clears away heat, detoxifies, disperses stagnation, and reduces swelling. Treats fever, erysipelas, macules, carbuncle, swelling, scrofula, and urinary retention.
 [Regular Dosage] For external use: decoction and wash; decoction, 6-15g.
 [Precautions] Do not take if you have weak spleen and stomach, Qi deficiency and fever, or ulcerated carbuncle with thin and light pus.
 [Modern research] It can be used to treat acute nephritis, purpura, lung abscess, retinal hemorrhage, etc.
 【Medical records】
 "Ben Jing": "It is used to treat cold and heat, paralysis, scrofula, carbuncle, malignant ulcer, goiter, and heat accumulation."
 "Bie Lu": "Get rid of white worms."
 "Medicine Properties": "It is used to relieve the five types of stranguria, urinary obstruction, and remove the heat in the heart."
 "Rihuazi Bencao": "It clears the small intestine and discharges pus. It treats sores and boils, relieves pain, and regulates menstruation."
 Li Gao: "It can disperse blood stagnation and qi accumulation in various meridians and reduce swelling."
 Wang Haogu: "It cures deafness and muteness."
 【Predecessors release medicine】
 "New Compendium of Materia Medica": Forsythia suspensa, bitter in taste, flat in qi, slightly cold, light and floating in nature, ascending, yang, non-toxic. Enters Shaoyin Heart Meridian, Shaoyang and Yangming Meridians of the Hands and Feet. It has special effects in purging the heat in the heart, dampness and heat in the spleen and stomach, removing carbuncle poison, inch white roundworm, and sores. It can regulate menstruation, relieve stranguria, and disperse blood stasis and qi accumulation in all meridians. It can only be used as an adjuvant, not as the main drug. It can be used to attack evil, but cannot be relied on to replenish the body. It is also an optional product. Nowadays, people use it indiscriminately regardless of deficiency or excess, which is laughable. Someone asked if Forsythia suspensa is an important drug for ascending, and it is also the licorice in medicine. Why do you think it is optional? Forsythia suspensa is not important. Licorice must be used to eliminate toxins; honeysuckle must be used to detoxify; alum stone must be used for disinfection; scutellaria, coptis, and gardenia must be added to clear toxins; rhubarb must be added to kill toxins. This is a method of treating poison. There is no one thing that can be used to treat poison. Without it, the symptoms will be aggravated, and with it, the symptoms will be relieved. However, if it is used as an adjuvant, it will be effective in attacking the evil, and it may not be without some benefit.