The Food and Drug Administration (FDA) consider caffeineTrusted Source to be both a drug and a food additive. They recommend a maximum intake of 400 mg a day.In prescription and over-the-counter (OTC) medicines, caffeine is used to treat tiredness and drowsiness, and to improve the effect of some pain relievers.It belongs to a group of medicines called central nervous system (CNS) stimulants.Foods containing caffeine can help restore mental alertness.Caffeine’s use as an alertness aid should only be occasional. It is not intended to replace sleep and should not regularly be used for this purpose.The FDA recommends that healthy adults limit their caffeine intake to a maximum of 400 mg a day, about 4 or 5 cups of coffee. This amount is not associated with negative effects.A person is unlikely to die from consuming too much caffeine in the diet.
CAFFEINE
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