Chloral hydrate solution is used for the treatment of insomnia, anticonvulsant, pre-anesthesia and pre-surgery medication. 1. Treatment of insomnia: chloral hydrate solution is a central sedative, sleep effect is mild, does not interfere with the sleep state and sleep cycle, suitable for patients who have difficulty falling asleep. But as a hypnotic drug, short-term application is effective, continuous use for more than two weeks will be ineffective. 2. Anticonvulsant: It is used in the treatment of epileptic persistent state, and can also be used for convulsions caused by pediatric hyperthermia, tetanus and eclampsia. 3. Pre-anesthesia and pre-surgery medication: Pre-anesthesia, pre-surgery and sleep electroencephalogram examination before the use of drugs, can be sedated and relieve anxiety, so that the corresponding process of treatment is safer and smoother, chloral hydrate has a strong inhibitory effect on the central nervous system, wake up without discomfort or dizziness, adverse reactions are small, there is no accumulation of effects, does not affect the cardiac and cerebral electroencephalogram of infants and young children, and other indicators, so it can be safely applied. Chloral hydrate disadvantages are bitter taste easy to cause vomiting, respiration, circulation has a slight inhibitory effect, gastritis gastric ulcer patients are prohibited from taking this drug, so the use of chloral hydrate solution should be carried out under the guidance of a doctor, the emergence of serious adverse reactions in a timely manner to contact the doctor.