How Long Does Victoza Stay in Your System?
Victoza stays in your system for about 3 days after the last injection, because liraglutide's half-life is only 13 hours per the FDA label.
From the Victoza FDA label · Free, no sign-up
At a glance
- Half-life
- 13 hours
- Peak after a dose
- 8 to 12 hours
- Steady state
- about 3 days
- Below 5% after stopping
- about 3 days
See your real levels
GlucoPal charts your estimated level from the doses you actually log.
Read the chart as a table
Victoza 1.8 mg, last dose on day 5. Modeled amounts absorbed, not blood levels.
| Timepoint | Estimated amount (mg) | % of steady peak |
|---|---|---|
| Day 0 on treatment | 0.00 | 0.0% |
| Day 1 on treatment | 0.39 | 42.7% |
| Day 2 on treatment | 0.51 | 56.0% |
| Day 3 on treatment | 0.54 | 59.7% |
| Day 5, last dose | 0.55 | 61.1% |
| 1 day after the last dose | 0.56 | 61.1% |
| 2 days after the last dose | 0.17 | 18.4% |
| 3 days after the last dose | 0.05 | 5.2% |
| 7 days after the last dose | 0.00 | 0.0% |
Educational estimate, not a blood level or medical advice. Follow your prescriber's instructions.
What is the half-life of Victoza?
Victoza's elimination half-life is 13 hours, per the FDA label: that is how long it takes for the amount of liraglutide in your body to halve. Levels peak 8 to 12 hours after a dose, and on the label schedule (a daily injection) they reach steady state about 3 days after the first dose. After a last dose they fall below 5% of that steady level in about 3 days.
Between scheduled doses, levels swing between a peak and a trough of about 61% of that peak, which is why the chart looks like a sawtooth rather than a flat line. The label also reports that approximately 55% of each dose is absorbed into circulation; the chart's mg figures build that in.
What if you miss a dose of Victoza?
The Victoza label instructs patients not to take an extra dose to make up for a missed one; the once-daily schedule simply resumes with the next dose.
That window is the half-life doing the work: with 13 hours of half-life, a late dose still lands on a meaningful base. This is the label's instruction to prescribers, not our advice; if you have missed a dose, your own label and prescriber are the authority.
A daily rhythm with a fast reset
With a 13-hour half-life, Victoza works on a completely different timescale from the weekly GLP-1s: levels swing further between doses (the trough sits near 61% of the peak), missed days genuinely lower the base, and both starting and stopping play out in days rather than weeks.
The practical upside is a fast reset after stopping; the practical demand is day-to-day consistency, which is exactly the kind of routine a dose tracker is for.
FAQ
Is the Victoza half-life different from Saxenda?
No. Victoza and Saxenda are both liraglutide, so the 13-hour half-life is identical; the brands differ in maximum dose and indication rather than in how fast the molecule clears.
Does a higher Victoza dose take longer to leave your system?
Not meaningfully. Victoza is eliminated proportionally: the amount cleared per day is a fixed fraction of what remains, so every dose falls along the same percentage curve on the same timeline. A higher dose means more liraglutide at every point, not a longer goodbye.
Are these numbers my actual blood levels?
No. The curve is a population estimate built from the FDA label's median half-life and absorption figures: anyone who took the same doses on the same days would see the same chart. Individual metabolism runs faster or slower than the median, so treat it as the shape and rough scale of your levels, not a measurement.
Is this calculator free, and do I need to sign up?
Yes, it is free, and no sign-up or email is required. You see the full curve and the estimated clearance timeline instantly. The GlucoPal iOS app it comes from is also free to download.
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Sources
Built and maintained by GlucoPal, the free app for iPhone and Android for tracking GLP-1 weight loss medications. All pharmacokinetic figures were read directly from the current FDA label on DailyMed on 27 August 2026 and re-checked on 2 October 2026.
You take your GLP-1s. We'll take care of the rest.
