Coke contains caffeine, which is a carbonated beverage and causes excitement in the body, so taking Coke orally at night may lead to insomnia and difficulty sleeping. However, it is also related to the physical condition of each person, for example, patients with neurological weakness may have increased sleep disorders after drinking cola. If you are a good sleeper and do not have difficulty sleeping or neurological weakness, drinking cola will not lead to insomnia, so it is related to your physique. Once you have a neurasthenic physique and sleep disorder, it is not recommended to take cola, coffee, strong tea orally during the day or before bedtime to stimulate drinks, you can drink milk because the tryptophan in milk has a calming effect on the cerebral cortex and can improve sleep.