The difference between compound Colla Corii Asini and Yiqi Nourishing Blood Oral Liquid is in the drug composition, efficacy and precautions for medication. 1. Different drug composition: Compound Colla Corii Asini consists of Colla Corii Asini, Red Ginseng, Radix Rehmanniae Praeparata, Radix et Rhizoma Ginseng and Hawthorn; Oral Liquid for Nourishing Blood consists of Radix et Rhizoma Ginseng, Radix et Rhizoma Dioscoreae, Radix et Rhizoma Ginseng and other drugs. 2. Different efficacy: Compound Colla Corii Asini Syrup has the efficacy of tonifying qi and nourishing blood, which is used for qi and blood deficiency, dizziness, panic and insomnia, loss of appetite, etc.; Oral Liquid of Enriching Qi and Nourishing Blood has the efficacy of enriching qi and nourishing blood (replenishing the body’s qi and blood), and is used for panic and shortness of breath caused by qi and blood insufficiency, lack of splendor of the complexion, physical weakness, and fatigue of the spirit (mental exhaustion, physical fatigue). Although there are similarities in the efficacy of the two medicines, Yiqi Nourishing Blood Oral Liquid contains not only medicines to tonify qi and blood, but also medicines to nourish yin and warm yang. Compound Colla Corii Asini is mainly used to replenish qi and blood. 3. Different medication precautions: allergic to compound Colla Corii Asini plasma is prohibited, weak spleen and stomach, vomiting and diarrhea, abdominal distension and loose stools (feces thin and not shaped), cough and phlegm should be used with caution, cold patients should not be taken, children, pregnant women, hypertension and diabetes should be taken under the guidance of a physician. Allergic to Yiqi Nourishing Blood Oral Liquid is prohibited, should not be taken by patients with cold and fever, should not be taken by people with deficiency cold diarrhea, hypertension and other chronic diseases, children, pregnant women, lactating women should be taken under the guidance of a physician. Compound Colla Corii Asini and Yiqi Nourishing Blood Oral Liquid need to be used under the guidance of a traditional Chinese medicine practitioner, and should not be used blindly to avoid adverse reactions.