There is no such thing as “what diseases are best treated with Dilong”. Dilong can be used to treat liver wind internal movement, stroke hemiplegia, lung fever, coughing, thirst and urination, etc. It is most effective when used in the right way and in a reasonable combination to treat the disease. Dilong has the effect of clearing heat, calming alarm, clearing collaterals, calming asthma, and diuretic. It can be used alone to clear heat and calm wind to stop alarm for patients with liver-wind internal activation, and can be used with Astragalus, Angelica sinensis, and Fenghi to clear the meridians and activate collaterals, replenish qi and activate blood (replenish qi and blood to fill the body and blood and blood vessels), and clear heat to remove paralysis for patients with hemiplegia and rheumatic paralysis. For patients with lung-heat cough and asthma, it can be combined with ephedra, almonds, mulberry white bark and other drugs to clear heat and calm asthma; for patients with edema and low urine, it can also be used alone for diuresis and swelling. Dilong is salty and cold in nature, easily injuring the yang qi of the spleen and stomach, so it should be used with caution for those who have deficiency of cold in the spleen and stomach (spleen and stomach weakness and cold). The compounding and use of Chinese medicines is recommended to be carried out under the guidance of physician’s diagnosis, and should not be used on one’s own to prevent adverse effects.