Dextran is a compounded formulation indicated for patients with mild to moderate depression and anxiety. The main ingredients of Dextran are haloperidol hydrochloride and melitrexin hydrochloride, which are effective in the treatment of neurasthenia, psychogenic depression, occult depression, depressive neurosis, psychosomatic disorders with anxiety and emotional indifference, and menopausal depression. Due to the excitatory properties of Dextran, it is usually taken in the morning and has clear contraindications and adverse effects causing insomnia. Therefore, Dextran can treat insomnia with short-term use, but long-term use is not recommended. Insomnia is a clinical manifestation caused by a variety of complex factors, mainly manifested as difficulty in falling asleep, easy to wake up at night and fall asleep again, and low maintenance of sleep time, etc. Causal factors include physiological, psychological, environmental and other changes, as well as drugs, neuropsychiatric and somatic disorders. Common causes include family genetic factors, stress and life events, lifestyle problems, self-characteristic personality, previous illnesses and special medications, and advanced age of women. Some patients suffer from depression and anxiety that trigger insomnia, also known as secondary insomnia. The treatment of insomnia should start with prevention and correction of bad sleep behaviors and concepts, in addition to identifying the causes of insomnia and treating them, and treating the symptoms if the causes are unknown. Treatment methods include psychotherapy, medication, physiotherapy, Chinese medicine and comprehensive treatment, etc. Therefore, there is still no certain basis as to whether Dextran can be used to treat insomnia, and it has to be taken under the guidance of doctors in regular hospitals.