# How long does *Botox last?*

> How long botulinum toxin works, why the duration depends on the area, dose and muscle strength, when the effect starts and what shortens or extends it.

- Source: https://www.vivaderm.de/guide-botox-duration-en.html
- Language: en
- Publisher: VIVA DERM, Privatpraxis für ästhetische Medizin, Rosastraße 6a, 45130 Essen, Germany, +49 1520 8367711
- Responsible physician: Katayoun Mostaghimi (Fachärztin für Allgemeinmedizin)
- Updated: 2026-10-05

The most common question before a treatment – and one with no single number for everyone. What determines the duration, and what is realistic.

## What determines the duration.

**The substance is broken down and the nerve endings recover.** Botulinum toxin temporarily blocks the signal from nerve to muscle. The body breaks the protein down and forms new connections, so muscle activity gradually returns. That is intended – the effect is time-limited by nature.

**Three to four months is typical, sometimes up to six.** For frown lines, forehead and crow's feet the effect usually fades visibly after about three to four months. For large, strong muscles such as the masseter, or for hyperhidrosis treatment, four to six months is common.

**Onset:** first changes after two to three days, the full result after about ten to fourteen days. That is why a check-up makes sense no earlier than two weeks later – before that, neither the result nor any top-up can be judged.

**What shortens or extends it:** dose and muscle strength, metabolism, very intensive sport, strong facial movement and – at the first treatment – the still-unbroken habit of tensing the muscles. After several treatments many people report longer intervals because the muscle is less trained. That cannot be promised.

**Re-injecting too early is not a good idea.** Intervals shorter than three months increase the risk that the body forms antibodies and responds less well. A top-up makes sense once facial movement has clearly returned – after medical assessment.

## The essentials.

- **Onset:** 2–3 days, full after ~2 weeks
- **Expression lines:** usually 3–4 months
- **Masseter / hyperhidrosis:** usually 4–6 months
- **Minimum interval:** about 3 months

## Important note.

This text is general information. It replaces neither a medical examination nor the consultation required before any treatment under German law (§ 630e BGB). Whether and which treatment is suitable for you can only be said after examination and consultation. No treatment results are promised.

## Frequently asked questions.

**Why does it last less time for me than for others?**

Muscle strength, metabolism, dose and movement habits differ. The first treatment also often lasts a little less than later ones. This is discussed at the check-up.

**Can the effect be extended?**

Not deliberately. Regular treatments at sensible intervals, no exaggerated facial movement right afterwards and the right dose are what can be influenced.

**What happens if I don't repeat it?**

Muscle activity returns completely; the lines then look as they did before. There is no 'rebound' that would be worse than the starting point.

**When is the check-up?**

About two weeks after the treatment, once the full effect has developed.

## Related.

- [Botulinum toxin](https://www.vivaderm.de/botox-en.html) – Areas, process, risks
- [Frown lines](https://www.vivaderm.de/botox-frown-lines-en.html) – The most common area
- [Aftercare](https://www.vivaderm.de/guide-aftercare-en.html) – What to do, what to avoid

## Sources

- [NHS: Botox injections – patient information](https://www.nhs.uk/conditions/cosmetic-procedures/non-surgical-cosmetic-procedures/botox-injections/)
- [DGBT – German Society for Aesthetic Botulinum Toxin Therapy](https://www.dgbt.de/)
- [BfArM – Federal Institute for Drugs and Medical Devices](https://www.bfarm.de/)
- [European Medicines Agency (EMA)](https://www.ema.europa.eu/)
- [NHS: non-surgical cosmetic procedures](https://www.nhs.uk/conditions/cosmetic-procedures/non-surgical-cosmetic-procedures/)
- [Medical Association North Rhine – patient information](https://www.aekno.de/patienten)
- [§ 630e BGB – duty to inform before treatment (German Civil Code)](https://www.gesetze-im-internet.de/bgb/__630e.html)

---
This page is general information and does not replace medical consultation and informed consent (§ 630e BGB). No guarantee of results. Prices are guide prices per GOÄ. Quoting with attribution (VIVA DERM, Essen) is expressly permitted.