Maidong is a common Chinese herbal medicine, which has the effects of clearing away heat and moistening the lungs, nourishing yin and reducing fire, benefiting the stomach and generating fluids. However, there are also contraindications and side effects, as follows:

1. Pregnant women, lactating women and children should not take maitong.

2. Maitake is not suitable for witnesses with cold spleen and stomach, diarrhea, phlegm-dampness and phlegm-heat.

3. Maitake should not be used with licorice to avoid affecting the efficacy.

4. Long-term use of large quantities of maitake may lead to indigestion, headache, dry mouth, dry eyes, sore throat and other adverse reactions.

5. Maitake has a certain hypoglycemic effect, and should not be used for those who are already hypoglycemic.

In short, the rational use of maitake, follow the physician's advice, you can maximize its efficacy and reduce adverse reactions.