how long does xeomin take to work

Written & medically reviewed by the Dermapedia team

At a Glance

Xeomin's FDA label reports that the median onset falls within two to seven days. That is unusually specific — Xeomin is one of the few botulinum toxin products whose label states an onset time at all.

The full result takes about two to four weeks. That is when your injector should judge it, and when a small top-up is added if one side sits higher than the other.

The label describes a typical duration of up to 12 to 16 weeks, which is roughly three to four months. That figure sits in a general section covering all of Xeomin's uses rather than in the cosmetic trial results, so treat it as a class-level expectation.

Key Facts

First visible change	The median falls within 2 to 7 days, per the FDA label
Full result	About 2 to 4 weeks
Touch-up assessment	Usually at 2 weeks
How long it lasts	Up to 12 to 16 weeks — a general figure on the label, not one measured on facial lines
Retreatment	No sooner than every 3 months
Approved cosmetic areas	Frown lines, horizontal forehead lines, and crow's feet
Frown-line dose	20 units, in 5 injections of 4 units
Maximum for all three upper-face areas	64 units in one session

The first week

Xeomin is botulinum toxin type A with the helper proteins that usually surround it stripped away. That difference gets a lot of attention, but it does not make it work faster — the timeline is much like the other toxins.

The label reports that the median onset falls somewhere within two to seven days. That is a range across the studies behind the label rather than a single number, and the honest reading is that most people notice something during the first week.

In practice the first sign is not a smoother forehead. It is the feeling that the muscle will not fully engage when you try to frown or raise your brows.

Nothing on day one or two is a cause for concern.

Weeks two to four

This is where the result settles. Peak effect for botulinum toxin generally lands in the two-to-four week window.

Two weeks is the standard point for a review. If one brow sits higher, or one area is still moving more than you wanted, a few extra units at this visit corrects it. Worth knowing that this two-week convention is standard practice rather than a rule established by a trial — but it sits well inside the documented peak window.

Ask whether that review is included in the price before you book.

How long it holds

The label describes a typical duration of up to 12 to 16 weeks, so most people are looking at three to four months. Worth knowing that this figure sits in a general monitoring section covering every one of Xeomin's uses, not in the results from the facial-line trials.

It fades gradually. Movement returns before the lines do.

Repeat treatment should not be given more often than every three months.

What changes the timing for you

Muscle strength. A stronger muscle takes more to switch off and often recovers sooner.
Dose. Lower doses tend to come on and wear off at the lighter end.
The area treated. Small muscles around the eye often respond a little quicker than the broad forehead sheet.
How many times you have had it. Some people find results feel more predictable after the first couple of rounds, once the injector knows how the face responds.

If it has not worked at all

Give it the full two weeks first. Most "it did not work" reports at day four are simply early.

If two weeks pass with no change at all, tell your injector. The usual explanations are a dose that was too low for your muscle, placement that missed the target, or — much less often — that your body has developed a response to botulinum toxin that stops it working. That last one is uncommon, and it is worth a proper conversation rather than switching brands on your own.

Get emergency help now if

You have trouble swallowing, speaking, or breathing
You feel weakness spreading to muscles you did not have treated

Go to an emergency department or call 911. Do not wait for a call back. These are rare, but they are the symptoms named in the FDA boxed warning that every botulinum toxin product carries, deaths have been reported, and they can begin hours or even weeks after treatment.

Call your injector if

One eyelid or eyebrow starts to droop, or your vision changes
One side sits noticeably higher than the other at two weeks

If a vision change is sudden or severe, seek urgent care rather than waiting.

Questions people ask+

How long does Xeomin take to work?The FDA label reports that the median onset falls within two to seven days. The full result takes about two to four weeks.

Is Xeomin faster than Botox?Some studies have found incobotulinumtoxinA showing an observable effect a couple of days sooner, but the difference is small and not something most people would notice. Both settle over about two weeks.

Why is my Xeomin not working after 5 days?Five days is still inside the normal onset window, and the result is not finished until about two weeks. Wait for the two-week mark before judging it.

How long does Xeomin last?The label gives a typical duration of up to 12 to 16 weeks, so roughly three to four months. That figure covers all of Xeomin's uses rather than facial lines specifically.

Is Xeomin approved for forehead lines?Yes. Since July 2024 Xeomin is approved for horizontal forehead lines and crow's feet as well as frown lines, and the label directs that the forehead be treated together with the frown lines. Botox Cosmetic holds those same three approvals and has since 2017.

Does Xeomin work if other toxins have stopped working for me?It is sometimes tried for this reason, because Xeomin has no helper proteins for the immune system to react to. The argument is reasonable but not proven. Raise it with your injector rather than assuming it will solve the problem.

Can I have a touch-up before three months?A small top-up at the two-week review is normal practice. A full repeat treatment should not be given more often than every three months.

References+

FDA prescribing information for Xeomin (incobotulinumtoxinA)

Source for the median onset within two to seven days, the 12 to 16 week duration, the 20-unit glabellar dose, the 64-unit maximum for all upper facial lines, and the three-month retreatment interval.

FDA approval letter, BLA 125360 supplement S-099, 5 July 2024

The approval adding horizontal forehead lines and lateral canthal lines to Xeomin's cosmetic indication.

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