I drink at least 25 cups of coffee a week, population say coffee keep you alert but whenever I have coffee I enter into a vast sleep why is that? please help I entail some answers?

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Answers:    Coffee contains caffeine, a stimulant drug that when ingested will 'speed' up your system. When stimulants wear off, you crash and your body become tired. People react differently to drugs, and you a moment ago crash quicker than other people.

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