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Levothyroxine

What the body does with Levothyroxine, from the dose to the exit, as its Wikipedia drug infobox records it.

Quoted from the Wikipedia infobox, not yet written up by hand. The order is the usual order of events, not a measured schedule.

LevothyroxinetakenExitFeces and urine

The clock, on a log scale

Each bar runs from the dose to about five half-lives, roughly when 97% of that molecule has been converted or cleared. The scale is logarithmic so minutes and days fit on one line.

  1. doseabsorbed

    Bioavailability

    40-80% 1

  2. hoursbreakdown

    Metabolism

    Mainly in the liver, kidneys, brain, and muscles 1

  3. half-lifehalf gone

    Elimination half-life

    ca. 7 days (in hyperthyroidism 3–4 days, in hypothyroidism 9–10 days) 1

  4. exitleaves the body

    Excretion

    Feces and urine 1

Source

  1. Wikipedia, Levothyroxine, drug infobox (revision 1368685201), CC BY-SA 4.0. Values quoted as they appear, with wiki markup removed.

Half-lives vary between people, doses and routes. This page explains what the body does with a drug. It is not dosing advice.