sentence: Coffee stimulates the body, and people tend to drink quite a lot of it when they are at work.
sentences_before: Some insomnias are caused by stimulant drugs, such as amphetamine, cocaine and nicotine.
sentences_after: If they drink too much of it, they will have problems falling asleep in the evening.
concept_name: coffee
headings: Insomnia Causes
categories: Sleep disorders