People with high blood pressure can drink Lingzhi water, but they must take it under the guidance of a doctor. Because Lingzhi has the effect of tonifying qi, some people are prone to elevated blood pressure after taking qi tonics. Lingzhi is sweet and flat in nature, and belongs to the heart, lung, liver and kidney meridians. Its main effects are to tonify qi and calm the mind, stop coughing and calm asthma, and is used clinically to treat restlessness, insomnia and palpitations. It is used to treat restlessness, insomnia, palpitations, dreaminess, forgetfulness, body fatigue, and poor appetite due to deficiency of qi and blood and loss of nourishment of the heart and mind. In addition, Ganoderma lucidum is sweet in taste and can enter the lung meridian, which can nourish the qi of the lungs and kidneys, stop coughing and calm asthma, and is used to treat lung deficiency and asthma. It is also used to treat deficiency and shortage of breath and food. Pharmacological studies have also confirmed that reishi can reduce blood viscosity, increase myocardial contractility, increase coronary blood flow and cardiac output, improve heart rate, extend sleep time and improve sleep quality, and stop cough, calm asthma and expectorant.