Most people understand that one possible side effect of caffeine consumption is sleepless nights. Alcohol's effect on sleep is less well understood, and many people are unaware of how drugs and sleep interact.
In addition to substances such as alcohol and caffeine, drug abuse and drug withdrawal can also cause sleep disorders. Since chemicals can react differently in each human body, their effects differ from person to person, making it difficult to determine exactly how much a certain drug will impact a person's sleep.
One of nicotine's many side effects may be sleep deprivation. Smoking and sleep problems are complex. Data from the National Center for Health Statistics shows that a disproportionate number of people who sleep less than six hours a day are smokers (Schoenborn
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