Generally speaking, there is no such thing as how long it takes to cook without toxicity. Decocting for about thirty minutes can drastically reduce the toxicity of fine pungent, so that the person taking it will not be poisoned. The efficacy of fine pungent is to warm the lungs and dissolve drinks (by warming the lungs to promote the operation of water and fluid that has stopped gathering), to relieve the surface and disperse cold (to remove the cold from the surface of the muscle), to dispel wind, to clear the orifices and to relieve pain. Clinically, it is often used to treat wind-cold and cold, headache, paralysis, toothache, as well as nasal abyss (mainly manifested as filthy nasal mucus, the amount of which cannot be wiped away), congested nose and so on. In the use of fine Xin in medicine, should be noted that Yin deficiency dry cough, lung heat cough and Yin deficiency hyperactivity headache patients should not use fine Xin, and according to the principle of Chinese medicine, fine Xin is not suitable for use with veratrum. Because of the toxicity of the fine Xin, so pregnant women and children should not be used. In addition to the use of fine Xin into the medicine, must consult a physician or pharmacist, patients should not blindly self-medication, in order to avoid the danger.