Si Jun Zi Wan (四君子丸) is effective in benefiting qi and strengthening the spleen, and is mainly used for treating spleen and stomach qi deficiency as well as poor appetite. Four Gentlemen Pill is a traditional Chinese medicine composed of Radix Codonopsis, Poria, Rhizoma Atractylodis Macrocephalae and Radix et Rhizoma Glycyrrhizae, which can benefit qi and strengthen the spleen (regulate the qi of the spleen and stomach), and treats conditions such as deficiency of qi of the spleen and stomach, poor gastric intake, as well as loose food and stools (scanty and unshaped feces). In the formula, Radix Codonopsis Pilosulae is used as the monarch to strengthen the spleen and nourish the stomach, Atractylodes Macrocephalae is used to strengthen the spleen and dry dampness (to strengthen the spleen and get rid of dampness), and Poria cocos is used as the supporting agent, while Radix et Rhizoma Glycyrrhizae is used to benefit qi and harmonize zhong (to replenish qi and regulate the spleen and stomach), and to regulate the medicines (to regulate the pharmacological properties of different Chinese herbs). Adverse reactions and contraindications of Sijunzi Pill are not clear. Precautions include avoiding indigestible food, should not be taken by patients with colds and fever, and should be taken under the guidance of a physician for those with serious chronic diseases. Before taking Sijunzi Pill, should be used under the guidance of a traditional Chinese medicine practitioner, do not buy and use on your own, so as not to delay the condition.