Dysport is not a filler. It is a neuromodulator, a completely different category of injectable that works by relaxing muscles rather than adding volume. The confusion is understandable because both Dysport and fillers are used to reduce wrinkles, but they do so through entirely different mechanisms and treat different problems.
How Dysport Actually Works
Dysport’s active ingredient is abobotulinumtoxinA, a purified protein derived from botulinum toxin (the same family as Botox). When injected into a specific muscle, it blocks the chemical signal that tells that muscle to contract. Without that signal, the muscle relaxes, and the wrinkle it was creating smooths out. The FDA classifies Dysport as an “acetylcholine release inhibitor and neuromuscular blocking agent,” placing it firmly in the neurotoxin category, not the filler category.
This relaxation effect is temporary. Results typically appear within two to three days, sometimes as early as 24 hours. The effects last about four months on average, though some people maintain results for five or even six months before the muscle gradually regains its ability to contract.
What Fillers Do Instead
Dermal fillers take the opposite approach. Rather than changing how a muscle behaves, fillers physically add volume beneath the skin. Most popular fillers like Juvederm and Restylane are made from hyaluronic acid, a substance your body produces naturally. Others, like Sculptra, use poly-L-lactic acid to stimulate your own collagen production over time. In every case, the filler is sitting in or under the skin, plumping up areas that have lost volume or filling in creases.
This distinction matters because the two products target fundamentally different types of wrinkles.
Dynamic Wrinkles vs. Static Wrinkles
Wrinkles fall into two broad categories, and knowing which type you have determines which treatment makes sense. Dynamic wrinkles are the lines that appear when you move your face: crow’s feet when you squint, frown lines between your brows, horizontal forehead creases when you raise your eyebrows. These are caused by repeated muscle contractions, and Dysport is designed specifically for them. Its only FDA-approved cosmetic use is for moderate to severe frown lines (the vertical “11” lines between the eyebrows) in adults under 65.
Static wrinkles, on the other hand, are visible even when your face is completely at rest. They result from volume loss, sun damage, and the natural breakdown of collagen and fat pads as you age. The nasolabial folds running from your nose to the corners of your mouth are a classic example. Thinning lips and hollow cheeks also fall into this category. Fillers are the appropriate treatment here because the problem isn’t muscle activity. It’s lost structure.
Why They’re Often Used Together
Many treatment plans combine both Dysport and fillers in the same session because aging affects the face in both ways simultaneously. You might have frown lines from years of muscle movement and volume loss in your cheeks happening at the same time. Using a neuromodulator and a filler together addresses both problems through what clinicians describe as “reflation and relaxation,” restoring lost volume while calming overactive muscles.
There’s also a practical benefit to combining them. Research suggests that using a neuromodulator alongside a filler may help the filler last longer. When the muscle pulling on the skin above the filler is relaxed, the filler experiences less mechanical stress, so it breaks down more slowly.
Side Effects to Expect
Because Dysport and fillers are injected into different tissue layers and contain completely different substances, their side effect profiles differ. In clinical trials for frown lines, 9% of Dysport patients reported headaches (compared to 5% with placebo), and about 3% had pain or a reaction at the injection site. These are generally mild and short-lived.
Filler side effects tend to be more localized: swelling, bruising, and tenderness at the injection site are common. Because fillers add physical volume, there’s also a small risk of lumps or asymmetry that doesn’t apply to Dysport.
How to Tell Which One You Need
A simple test: look in the mirror with a completely relaxed face. If the wrinkle disappears when you stop making the expression, it’s a dynamic wrinkle, and a neuromodulator like Dysport is the right tool. If the wrinkle is still there when your face is at rest, it’s a static wrinkle, and a filler will be more effective. Many people over 35 or 40 have both types, which is why combination treatments are so common.
If your main concern is volume, such as lips that have thinned out, cheeks that look flatter than they used to, or deep folds around the mouth, a filler is what you’re looking for. Dysport won’t add any volume to those areas. Conversely, if your issue is the lines that deepen every time you frown or squint, injecting filler into those spots without addressing the underlying muscle movement will produce a less natural and less durable result than Dysport would.