Botox and Dysport both last an average of 3 to 4 months. Dysport kicks in within 2 to 3 days, while Botox takes 5 to 7 days to fully show. The real duration of your results depends far more on your metabolism, muscle strength, dosage, and injector than on which product you chose.
Short version: Both last about the same. Choose Dysport for fast onset and larger areas like the forehead. Choose Botox for precision work like crow’s feet or a lip flip.
“How long does Botox last?” is one of the most-searched questions in the entire cosmetic industry, and the honest answer is more nuanced than the 3 to 4 months you have probably heard. Two people can leave the same appointment, treated by the same injector, with the same units of the same product, and one will be back in 10 weeks while the other stretches a full 5 months. The product matters less than most people think. What matters far more is your body, your habits, and how your injector dosed you.
How Long Does Botox Typically Last?
Botox (onabotulinumtoxinA) typically lasts 3 to 4 months when used for forehead lines, glabellar (11s) lines, and crow’s feet. First-time patients often report a shorter window on their first round, sometimes as little as 8 to 10 weeks, because their facial muscles are still at full strength. With consistent treatment every 3 to 4 months, the treated muscles gradually weaken, which means results begin lasting longer at the same dose.
Duration also depends on the area being treated. Botox for masseter reduction (jaw slimming and TMJ relief) can last 4 to 6 months because a larger muscle takes longer to recover. Botox for hyperhidrosis, or excessive underarm and palm sweating, often lasts 6 to 9 months per treatment.
How Long Does Dysport Typically Last?
Dysport (abobotulinumtoxinA) has the same 3 to 4 month duration window on average for facial treatments. Some patients report that Dysport wears off slightly faster than Botox, while others report the opposite. Clinical studies show no meaningful difference in duration between the two neurotoxins when both are dosed correctly.
Where Dysport meaningfully differs is in how fast it starts working. Results begin appearing in 2 to 3 days with Dysport compared to 5 to 7 days with Botox. For patients approaching a wedding, photoshoot, or event on a tight timeline, Dysport often makes more practical sense.
Botox vs Dysport: Differences That Affect Longevity
The active ingredients are closely related but not identical. Both block the nerve signal that tells a muscle to contract, but the formulations differ in molecule size, spread, and dosing. Dysport has a smaller molecule that diffuses more broadly after injection. This is an advantage in the forehead, where a wider spread covers the area with fewer injection points. It becomes a disadvantage in smaller, more precise areas like a lip flip or brow tail, where Botox’s tighter diffusion gives the injector more control.
Dysport also uses a different unit system. A unit of Dysport is not equivalent to a unit of Botox. The working conversion is roughly 2.5 to 3 units of Dysport per 1 unit of Botox, which is why Dysport often looks cheaper per unit on a price menu but works out to a similar total cost per treatment.
What Actually Determines How Long Your Results Last?
Product choice accounts for very little of the variation between patients. The real drivers of longevity are the factors below, and most of them live in your own body and lifestyle rather than in the syringe.
How to Make Botox or Dysport Last Longer
A few small habits meaningfully extend your results. Avoid intense workouts, saunas, and hot yoga for 24 hours after injection, as elevated heart rate and heat can increase diffusion into unintended areas. Avoid rubbing or massaging the treated area for at least 4 hours. Skip facials and face-down massages for two weeks.
Longer term, consistent treatment every 3 to 4 months produces longer-lasting results than sporadic treatment. Daily SPF and a retinoid also preserve the smoothed appearance by slowing the formation of new lines between treatments. Zinc supplementation has been studied with mixed results, and some patients swear by it while the research remains inconclusive.
Which Should You Choose?
If you are treating your forehead or glabellar lines and want fast results before a specific date, Dysport is the stronger pick. If you are treating crow’s feet, a lip flip, a brow lift, or another precision area, Botox gives the injector more control and is the usual choice. Many of our patients use both in the same appointment, one product in the upper face and another in a precision zone, because the right tool depends on the target muscle rather than a single product preference.
For precision treatment areas, our injectors can walk you through exactly which zones we typically treat with Botox and why it performs better in tight, controlled areas like the crow’s feet and lip flip. For larger muscle groups, our team will explain how Dysport’s faster onset and wider diffusion pattern make it the go-to choice for treating the forehead and glabellar lines. The wrong question is which product lasts longer. The right question is which one fits your anatomy, your event timeline, and your injector’s technique, and that answer is always easier to land on in person than online.
