Why do levels of medications in your blood not increase to the point of overdose after taking them for an extended period.

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Why do levels of medications in your blood not increase to the point of overdose after taking them for an extended period.

In: Biology

Because our body uses them to cure our disease etc. so when the drug is used only the byproduct (and trace amounts of the original drug) are left in the blood, the body then removes them in multiple ways. For example, sweating, urination, excretion.

The same reason a drunk person can sober up after a few hours, the liver. The liver acts like a filter to ensure these things don’t stay there forever. It makes use of the things that are useful (nutrients, medicine) and neutralizes the things that aren’t (toxins, alcohol)