Taking herbs containing epiphyllum may cause insomnia over time. However, if the medication is used correctly and in accordance with the doctor’s instructions, it will not cause insomnia. Sliced epiphyllum is a concoction of epiphyllum, which has the function of restoring yang to save the body (saving fainting and unconsciousness by warming and replenishing yang), tonifying fire to help yang (replenishing yang qi in the body), and dispersing cold and relieving pain (relieving pain by dispelling cold evils in the body). Pieces of epiphyllum are used for death and yang deficiency, cold limbs and weak pulse, heart yang deficiency, chest paralysis (stuffy pain in the chest), heart pain, vomiting and diarrhea with deficiency cold, cold pain in the epigastric region (feeling cold pain in the stomach and abdomen), kidney yang deficiency (deficiency of yang in the kidneys), impotence with coldness in the uterus, coldness in the yin with oedema, external sensation of yang deficiency, and cold-dampness with paralysis and pain. If herbal medicines containing epiphyllum are used for a long period of time, they may cause depression and heat, which may lead to symptoms such as irritability and insomnia. There are more causes of insomnia, and it is recommended that patients with insomnia, seek timely medical treatment.