Quick Answer
Botox and Dysport are both botulinum toxin type A injectables that smooth dynamic wrinkles by relaxing the muscles that cause them. The main practical differences: Dysport tends to kick in a day or two faster and spreads over a slightly wider area, which can make it efficient for larger zones like the forehead, while Botox stays a bit more localized, which many injectors like for precise, detailed spots. Their dosing units are not interchangeable, so the unit counts look different on paper even at the same price.2 Both last around three to four months and produce comparable, natural-looking results.1 At Defiant in Lisle, both are $11 per unit, and your injector helps you choose at the consultation.
Botox and Dysport do the same core job. Both are FDA-approved injectables that relax the specific muscles behind frown lines, forehead lines, and crow's feet, so those creases soften without freezing your whole face. They come from different makers and behave a little differently once they're in, and that's where the "which one" question actually lives. Neither is better across the board. The right pick comes down to the area you're treating, how fast you want to see it, and what your injector knows works for your face.
Botox vs Dysport at a Glance
| Botox | Dysport | |
|---|---|---|
| Active ingredient | onabotulinumtoxinA | abobotulinumtoxinA |
| Maker | AbbVie (Allergan Aesthetics) | Galderma |
| How it works | Relaxes targeted muscles by blocking the nerve signal to contract | Same mechanism, botulinum toxin type A |
| Onset | Often 3 to 5 days, full effect around 2 weeks | Often 2 to 3 days, full effect around 2 weeks |
| Spread | More localized, precise | Diffuses over a slightly wider field per point |
| Dosing units | More concentrated (e.g. 20 units for frown lines)1 | Not interchangeable with Botox units (e.g. 50 units for frown lines)2 |
| Duration | About 3 to 4 months | Up to about 4 months |
| Often chosen for | Precise, smaller areas | Larger areas like the forehead |
What They Have in Common
Start with the big thing: Botox and Dysport are more alike than different. Both are purified forms of botulinum toxin type A, and both work the same way. They temporarily block the nerve signal that tells a specific muscle to contract, so the muscle relaxes and the skin over it stops creasing with every expression.1 That's why they're called neuromodulators or wrinkle relaxers rather than fillers. They don't plump anything. They quiet the movement that etches lines in over time.
Both are FDA-approved for moderate to severe frown lines, the vertical "elevens" between your brows.12 In practice, trained injectors use both across the upper face, including forehead lines and crow's feet, and results with either are comparable when the product is placed well. Both wear off gradually over a few months, and both are quick to receive. A typical visit runs about fifteen minutes.
If you had a good result with one, you are not locked in. Plenty of people use them interchangeably over time depending on the area and their injector's recommendation.
Where They Actually Differ
Here's where the choice gets interesting. The differences are real, but they're matters of degree, not night and day.
Onset. Dysport often shows up a little faster. Many people notice the softening in about two to three days, while Botox more commonly takes three to five days, with both reaching full effect around two weeks. If you have an event on the calendar, that head start can matter.
Spread. This is the most talked-about difference. Dysport tends to diffuse over a slightly wider field from each injection point, while Botox stays more localized. Neither is better in the abstract. A wider spread can be an advantage for covering a broad area like the forehead in fewer points, and a more localized product can be an advantage for precise, detailed work where you don't want any migration. This is exactly the kind of judgment your injector makes based on your anatomy.
Dosing and units. This one confuses people, so it's worth being clear. Botox and Dysport are measured in different units that are not interchangeable. The FDA labels spell it out: frown lines take about 20 units of Botox versus about 50 units of Dysport.12 A higher Dysport unit count does not mean a bigger dose or a stronger effect. It's simply a different scale. This matters mostly when you're comparing prices, because a per-unit price only means something once you know how many units your plan actually uses.
Duration. These are close. Both generally last around three to four months before movement gradually returns. Individual results vary with the area, the dose, and your own metabolism.
So Which Should You Choose?
Honestly, for most people either one delivers a great, natural result, and the deciding factor is your injector's read on your face rather than the brand on the vial.
A few patterns tend to hold. If you want the fastest possible onset before an event, Dysport's head start can tip the scale. If you're treating a broad forehead and like the idea of even coverage, Dysport's spread can be efficient. If you're after very precise, contained placement, or you've simply had reliably good results with Botox before, there's no reason to switch. The best approach is to talk through the specific lines you want softened and let an experienced injector match the product to the plan.
What matters far more than Botox versus Dysport is who's holding the syringe and whether the goal is a softened, still-expressive face rather than a frozen one. Good injecting is about placement and dosing, and that's true with either product.
How Defiant Does Botox and Dysport in Lisle
We offer both Botox and Dysport, and both are $11 per unit. Because the two are dosed on different scales, the number of units a given area needs isn't the same for each, so we map your exact plan and total at the consultation rather than quoting a one-size price. You only pay for the units you actually use.
Our approach is conservative by design. We treat the muscles tied to movement, the horizontal lines across your forehead, the "elevens" between your brows, and the crow's feet at the corners of your eyes, with the goal of softening them while keeping your natural expression. A visit takes about fifteen minutes, and we map out your areas before anything happens.
We're at 5100 Lincoln Ave in Lisle, and we see clients from Naperville, Downers Grove, Wheaton, Oak Brook, and across Chicago's western suburbs. If you're weighing neurotoxins alongside other treatments, our aesthetics overview walks through how they fit with microneedling, facials, and the rest.
- Botox and Dysport are both botulinum toxin type A wrinkle relaxers that soften dynamic lines by relaxing the muscles behind them. Results are comparable.
- Dysport tends to have a slightly faster onset (about two to three days) and diffuses over a wider field, which can suit larger areas like the forehead.
- Botox stays more localized, which many injectors prefer for precise, detailed placement.
- The dosing units are not interchangeable, so unit counts look different (about 20 units of Botox versus 50 of Dysport for frown lines) without meaning a different strength.
- Both last around three to four months. At Defiant, both are $11 per unit, mapped to your exact plan at the consultation.
Frequently Asked Questions
Softer Lines, Still You.
Whether Botox or Dysport fits your face is a quick conversation, not a guess. Come in, we'll map your areas, and you'll only pay for the units you need. Both are $11 per unit, in Lisle.
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Last updated July 17, 2026.