It can be taken with water before bedtime, but its effect may be limited, depending on individual differences, and may be mild in cases of chronic insomnia. In addition, insomnia is mainly manifested as difficulty in falling asleep, early awakening or intermittent sleep. If there is transient insomnia, usually 1-2 days there are some obvious triggers, after removing these triggers, the symptoms will be significantly better, in this case, you can not use medication or use short-term small doses of sleep-promoting drugs, usually lasting about 1-3 weeks, may be the recent emotional, stress, tension, etc., or jet lag will occur, this time in fact, it is also recommended to use some short-term Small doses of drugs to promote sleep.