Because Tianwang Buxin Pill will cause side effects if taken for a long time. Some Chinese herbal medicines are inherently toxic, such as cinnabar. Cinnabar contains permeable mercury salts, which can accumulate in pregnant women, leading to microcephaly, deafness, strabismus and mental retardation of newborns.

Moreover, because the dosage of cinnabar in this prescription is large, cinnabar is easy to be poisoned after long-term use. The reason of cinnabar poisoning is that its efficacy is slow and easy to accumulate, and eventually chronic renal failure occurs, which is harmful to the kidney, and it is easy to damage the spleen and stomach function after long-term use, so it should not be taken for a long time. For patients who take western medicine to control their sleep, they should try to avoid taking western medicine if possible to avoid dependence and make their condition worse.