How Long Does Botox Last?
From the practice of
Brian V. Heil, MD, FACS, board certified plastic surgeon
Published November 6, 2026 · Updated
Botox typically lasts about 3 to 4 months for frown lines, according to its FDA prescribing information. Softening begins in 2 to 3 days and peaks around 10 to 14 days. It then fades gradually as the treated muscle recovers, and most people come back every 3 to 4 months. Dose, treatment area and your own response can move that number.
Why does Botox wear off?
Botox blocks the release of acetylcholine, the signal a nerve sends to a muscle, and the block ends because the nerve recovers. A 2017 review describes new nerve terminals sprouting from the treated one, then being pruned once the original site works again. The label says the same in shorter form: reinnervation slowly reverses the effect. For the long view, see what happens if you stop getting Botox.
What makes Botox last longer or shorter for you?
A 2010 review of 35 studies concluded that treatments last at least 3 months and often 4 to 5, depending on the facial area, dose and formulation. Five variables move your own result.
| Variable | Direction | What the evidence shows |
|---|---|---|
| Treatment area | Frown lines have the firmest figure | The label gives 3 to 4 months for frown lines. Data on other facial areas is more limited and supports at least 3 to 4 months. |
| Muscle strength | Stronger muscles usually get a higher dose | Standard practice is to adjust the dose to muscle mass. Studies tracking relapse found 3 to 5 months in women and 4 to 6 in men, though the effect of sex still needs research. |
| Dose your provider sets | Too low a dose shortens it | In a trial in women, 83% of the lowest-dose group had relapsed at 4 months, against 28% to 33% of the higher-dose groups. In a trial in men, duration rose with dose. |
| First or repeat treatment | May lengthen over time | The evidence is limited, as the FAQ below explains. |
| Metabolism and individual response | Varies, and is hard to predict ahead of time | None of these studies isolates metabolism, but the spread between people is wide: in that trial in women, most held 3 to 4 months and some held up to 12. |
How long do Dysport and Daxxify last compared with Botox?
| Product | How long it lasts for frown lines | Retreatment limit on the label |
|---|---|---|
| BOTOX Cosmetic | About 3 to 4 months, per its label | More often than every 3 months has not been evaluated |
| Dysport | Up to 4 months, per its label | No more often than every 3 months |
| Daxxify | A median of about 6 months in its two phase 3 trials | No more often than every 3 months |
These are label figures and trial medians, not promises. Onset, spread and price are set side by side on Daxxify vs Botox and Dysport.
How often should you come back for Botox?
Most people book again every 3 to 4 months, as the result starts to fade. The label sets the limit: dosing more often than every 3 months has not been clinically evaluated, and some studies suggest more frequent or higher doses may lead to more antibody formation. Your provider decides your cadence at the consultation. If you are not seeing the results you want after two weeks, follow up with your provider about possible touch-ups.
Our physician assistants, including Zakery A. Koban, MPAS, PA-C, train personally under Brian V. Heil, MD, FACS. Botox is done at our Upper St. Clair office. Our Wexford office is set up for hair restoration and consultations, and its desk at (724) 933-1800 will tell you whether a treatment is on the Wexford schedule or best booked in Upper St. Clair. Neurotoxins are priced per treatment area: one is $330, two are $535 and three are $795.
What are the risks, and when should you call?
Bruising, headache and a droopy eyelid are the side effects to know. The AAD says bruising lasts about 1 week, and in the label’s trials eyelid droop reached 3% with frown-line treatment and headache 9% with forehead-line treatment. The label also carries a boxed warning: the toxin’s effect can spread beyond the injection area, hours to weeks later, and swallowing or breathing trouble can be life threatening. Get medical help right away if that happens. For anything else, call Upper St. Clair at (412) 835-5544, and see our aftercare for the first 24 hours. More injectable questions are on the Acqua Blu blog.
Frequently asked questions
How long does Botox take to work?
The label says the injected muscles start to relax 1 to 2 days after injection, building through the first week. You should see softening in 2 to 3 days, and Cleveland Clinic puts full results at 10 to 14 days. For an event, book one to two weeks ahead.
How long does Dysport last?
The Dysport label says its effect on frown lines may last up to 4 months, and that it should not be given more often than every 3 months. A 2010 review estimated its retreatment interval at a mean of 3.9 months.
Does Botox last longer the more you get it?
It may, though the evidence is limited. A 2010 review says repeated treatments may prolong the effect, and Cleveland Clinic says muscles may train themselves to contract less, so visits can be spaced further apart. In a small 2026 study of 21 women, frown-muscle activity was still below pre-treatment levels 48 weeks after two years of injections, but two of its three groups were treated more often than every 3 months, and its authors call for larger studies.
What happens when Botox wears off?
Movement returns gradually, and the lines those muscles make come back. In the label’s frown-line trials, the share of people rated none or mild at maximum frown fell from 80% at day 30 to 48% at day 90 and 25% at day 120.
Can Botox wear off in 2 months?
It can. In those same trials, 70% of people were still rated none or mild at day 60, so about 3 in 10 were not. If yours fades that early, tell your provider, because dose and treatment area both move how long it holds.
Sources
- BOTOX Cosmetic (onabotulinumtoxinA) prescribing information. DailyMed, US National Library of Medicine. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=485d9b71-6881-42c5-a620-a4360c7192ab
- DYSPORT (abobotulinumtoxinA) prescribing information. DailyMed, US National Library of Medicine. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=71313a04-1349-4c26-b840-a39e4a3ddaed
- DAXXIFY (daxibotulinumtoxinA) prescribing information. DailyMed, US National Library of Medicine. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=3aaa6e14-a3f7-4fb2-b9f9-d3a9c3ae1f74
- Carruthers JD, et al. DaxibotulinumtoxinA for Injection for the Treatment of Glabellar Lines: Results from Each of Two Multicenter, Randomized, Double-Blind, Placebo-Controlled, Phase 3 Studies (SAKURA 1 and SAKURA 2). Plast Reconstr Surg. 2020;145(1):45-58. https://doi.org/10.1097/PRS.0000000000006327
- Flynn TC. Botulinum toxin: examining duration of effect in facial aesthetic applications. Am J Clin Dermatol. 2010;11(3):183-199. https://doi.org/10.2165/11530110-000000000-00000
- Pirazzini M, et al. Botulinum Neurotoxins: Biology, Pharmacology, and Toxicology. Pharmacol Rev. 2017;69(2):200-235. https://doi.org/10.1124/pr.116.012658
- Carruthers A, Carruthers J, Said S. Dose-ranging study of botulinum toxin type A in the treatment of glabellar rhytids in females. Dermatol Surg. 2005;31(4):414-422. https://doi.org/10.1111/j.1524-4725.2005.31107
- Carruthers A, Carruthers J. Prospective, double-blind, randomized, parallel-group, dose-ranging study of botulinum toxin type A in men with glabellar rhytids. Dermatol Surg. 2005;31(10):1297-1303. https://doi.org/10.1111/j.1524-4725.2005.31206
- Kane MAC, et al. Evaluation of variable-dose treatment with a new U.S. Botulinum Toxin Type A (Dysport) for correction of moderate to severe glabellar lines: results from a phase III, randomized, double-blind, placebo-controlled study. Plast Reconstr Surg. 2009;124(5):1619-1629. https://doi.org/10.1097/PRS.0b013e3181b5641b
- Ahmed MB, et al. Effect of Botulinum Toxin Injection Intervals on the Irreversibility of Targeted Muscle Paralysis: An Electromyographic Study. Aesthet Surg J. 2026. https://doi.org/10.1093/asj/sjag081
- Cleveland Clinic. Botox injections. https://my.clevelandclinic.org/health/treatments/8312-botulinum-toxin-injections
- American Academy of Dermatology. Botulinum toxin therapy: FAQs. https://www.aad.org/public/cosmetic/wrinkles/botulinum-toxin-faqs
Treatments at Acqua Blu Medical Spa in Upper St. Clair are provided under the direction of Brian V. Heil, MD, FACS, the practice’s founder and medical director. A consultation is the best way to find out what fits your skin and your goals.
This is general information, not medical advice. Candidacy and treatment parameters are determined by a licensed provider at a consultation.
