There is no report on the harm of sour jujube kernel to the heart. It has the effects of tranquilizing the mind, nourishing the heart and benefiting the liver, and is used for forgetfulness and insomnia, palpitations (rapid heartbeat, often accompanied by panic), and dazed and anxious (violent heartbeat, panic and restlessness), and so on, and it is recommended to take it under the guidance of a doctor. Sour Jujube Seed has a sweet flavor and enters the heart and liver meridians, which can nourish the yin and blood of the heart and liver, and is a nourishing and tranquilizing medicine. It is a nourishing and tranquilizing medicine for the deficiency of yin and blood in the heart and liver, and the loss of nourishment for the heart (the heart is deprived of nourishment), such as insomnia and palpitations (palpitations and frequent dreaming), etc. It can be used together with maitake dong (麦冬), and systemic he shouwu (何首乌). If the treatment of restlessness of the heart is a deficiency of the heart, spleen, qi and blood, it can be used with astragalus. Sour Jujube Seed has a sour flavor and can astringe yin to stop sweating (astringing yin fluid to reduce sweating), and generate fluids to quench thirst (promoting fluid production to relieve thirst). It is suitable for deficiency sweating and thirst due to injury of the body fluid. The former can be used together with Astragalus, Schisandra chinensis, Cornus officinalis, and the latter with Radix et Rhizoma Dioscoreae, Rhizoma Ophiopogonis, and Rhizoma Smallpox. The adverse reactions and contraindications of Sour Date Seed are not clear at present. Precautions: Caution should be taken when there is solid evil and fire, or when the patient suffers from slippery ejaculation. If Sour Jujube Seed is used with other drugs, consult a physician.