How Long Does Botox Last? Onset, Duration, and Repeat Timing (2026)

When does Botox start working?

Botox (botulinum toxin) begins to take effect 3–7 days after injection. The full result usually settles by 10–14 days. So a "nothing happened" feeling in the first days is normal; assessment waits two weeks. A follow-up visit is typically done in that second week.

How long does it last?

Average duration is 3–6 months and varies by area:

• Forehead and glabella: ~3–4 months
• Crow's feet: ~3–4 months
• Masseter (jaw muscle): ~4–6 months, sometimes longer

The first treatments can last a little shorter; with regular repeats, duration lengthens for some people.

Why does it differ between people?

• Muscle strength: Strong, active muscles can fade faster.
• Dose and product: Under-dosing gives a short effect; the right dose is set on examination.
• Metabolism and lifestyle: Heavy exercisers may see shorter duration.
• Area: Large muscles like the masseter can hold longer.

How often should it be repeated?

As the effect fades, it is usually repeated every 4–6 months. Repeating too early and too often "just in case" is not advised; unnecessary frequent dosing is both needless and raises the rare topic of resistance (antibody) development. The right approach is to track the effect with your physician and plan timing accordingly.

Is there anything that truly extends duration?

There is no miracle method that "extends" the effect. But these make the result more predictable:

• Correct dose and correct area (overdosing is not the answer)
• Regular physician follow-up
• Planning the first treatment early and measuredly (a preventive approach)

For first-timers

Starting with less in the first session is the safest path; more can be added at the two-week check if needed. The goal is to preserve expression and avoid over-correction.

Bottom line

Botox starts in 3–7 days, settles by 10–14, and lasts about 3–6 months. Duration varies by person and area; the right timing is set by physician follow-up, not by the mirror.