After your last Ozempic dose: how semaglutide clears
Because semaglutide has one of the longest half-lives among common medications, it does not disappear when you take your last dose. Levels decline over weeks, which is why appetite and other effects fade gradually rather than stopping abruptly.
How the decline unfolds
After a final dose, semaglutide follows the same exponential decay the calculator plots. With a roughly 7-day half-life, levels halve about every week: a meaningful fraction remains after one week, less after two, and it takes around five weeks to fall to a few percent of the starting level. Prescribing information even advises a prolonged period of observation after an overdose for exactly this reason.
From steady state, not a single dose
If you stop after months of treatment, the decline starts from your accumulated steady-state level, not from a single dose, so the absolute amounts are higher than this single-dose chart shows even though the shape of the curve is the same. The gradual fade is why effects on appetite and blood sugar taper off over weeks rather than ending the day you stop.
Using the calculator after stopping
Enter your last dose and its date to visualize the decay shape of that single injection. To approximate an ongoing user's decline you would scale that curve up to the steady-state baseline. As always this is a mathematical estimate, not medical guidance; any decision about stopping or changing treatment belongs with your prescriber.
Not medical advice
This content is for informational purposes only. It is not a substitute for advice from a qualified healthcare professional and should not be used to make medication, dosing, or health decisions.