For example, if I sprained my ankle, how does my body know to deliver advil to my ankle to help stop inflammation.
In: Biology
The short answer: it doesn’t.
When a medication is given orally or by IV injection, it affects the whole body. These are called *systemic medications* because they affect your entire system. So that Advil you take goes to your ankle, your back, your neck, your kidneys, and every other where you own.
Medications delivered directly to the site where they’re meant to work, like injected corticosteroids for injuries or topical creams, are delivered (mostly) to the site under concern, but that’s due to how they’re applied rather than anything “knowing” where to send them.
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