why the time that drugs like caffeine affect you are measured with “half life” regardless of the amount ingested rather than a constant rate

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Does the body not clear drugs like caffeine at a constant rate? If you drink less caffeine does the body clear it less quickly? Or am I not understanding it? Caffeine half life is about 5 hours (via Google), so regardless of if I drink 100mg or 900mg of caffeine, half (50mg or 450mg) will be left in my body 5 hours later? That seems like a pretty drastic difference in the rate of clearance.

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Anonymous 0 Comments

Imagine I hide 1000 coins in your house for you to find. After the first hour, you found 100. Do you think you will need an hour for the last 100 coins as well? The last few coins you might actually never find (or, give up the task beforehand.)

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