First, Liuwei Dihuang Pill is a medicine for invigorating kidney-qi. However, if patients with spleen and stomach weakness or yang deficiency take it, they may have symptoms such as epigastric discomfort, cold limbs, poor appetite, thin stool, dark stool and so on. People with kidney-yang deficiency are pale and weak, and prefer summer to winter. Such people are not suitable for taking Liuwei Dihuang Pill. Judge whether you have this symptom. If so, don't forget to eat Liuwei Dihuang to avoid side effects.

Second, people who have no obvious kidney yin deficiency should not eat it. Kidney yin deficiency is manifested as soreness and weakness of waist and knees, vexation and fever, dizziness and tinnitus. Although Liuwei Dihuang Pill has the function of tonifying kidney, even if healthy people take it for a short time, it will not have any side effects, but if they take it for a long time, they are likely to have full stomachs, loose stool and loss of appetite.

Third, Liuwei Dihuang Pill is a medicine that tends to tonify yin. There are more yin-softening drugs in the formula, which will hinder the digestive function after eating. People with kidney yin deficiency but poor spleen and stomach function can't eat it. Middle-aged and elderly people generally have poor spleen and stomach function, so they should be more cautious when taking it. Eating intermittently has little effect, but don't eat continuously.