Modalert is a drug that promotes wakefulness. It works by altering the neurotransmitters in the brain. These are natural chemicals. Modalert is prescribed to people who are suffering from excessive sleepiness caused by narcolepsy, shift work sleep disorder, or sleep apnea. One can also take Modalert to stay awake during work hours especially if he or she has a work schedule that keeps him or her from having a normal sleep routine for instance in the night shift.
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