Botox and Dysport are both FDA-approved neuromodulators derived from botulinum toxin type A. What sets them apart is the size and structure of the protein molecule, which affects how each product behaves once injected.
Dysport tends to be the better fit for larger surface areas like the forehead, where broader diffusion means fewer injection points and more even coverage. Botox is typically preferred for precise, targeted areas, including crow's feet and the area around the eyes, where staying close to the injection site matters.
Here's how they compare across onset, spread, and FDA-approved indications, which areas each is better suited for, and what your injector weighs when making the recommendation.
Botox and Dysport are injectable neuromodulators that temporarily relax targeted facial muscles to reduce expression lines. Botox is manufactured by Allergan Aesthetics. Dysport is manufactured by Galderma. Both require provider oversight and are dispensed through licensed medical practices.
Both are FDA-approved products derived from botulinum toxin type A. The active compound is the same; the protein formulation surrounding it differs. That formulation difference shapes how each product behaves once injected and is the source of every practical distinction covered below.
Botox and Dysport use the same active compound but differ in protein structure. That structural difference is the source of every distinction that follows: onset speed, how far each product travels once injected, unit equivalence, and which areas each is best suited for.
Botox contains onabotulinumtoxinA (ONA); Dysport contains abobotulinumtoxinA (ABO). The active mechanism is the same: both block acetylcholine release at the neuromuscular junction, relaxing the targeted muscle.
What differs is the protein complex surrounding the toxin. Dysport carries a smaller accessory protein structure. Botox retains a larger complex. That gap does not reflect a difference in potency or effectiveness.
Dysport generally produces visible results faster than Botox, often becoming apparent within the first few days. Botox takes three to five days for the initial effect. Per FDA prescribing information for both products, full effect is typically reached at approximately two weeks.
The difference is relevant for patients with an upcoming event. Otherwise, both arrive at the same result within a similar window.
The smaller Dysport molecule diffuses more readily beneath the skin once injected. Botox stays closer to the injection site. That difference in diffusion, not potency, is what shapes where each product tends to perform better.
Botox holds FDA approval for three cosmetic indications:
Dysport is FDA-approved for one cosmetic indication: Glabellar lines.
Both are used off-label for additional areas, including the lip flip, brow lift, masseter jaw slimming, and neck bands. Off-label use is common and clinically accepted. The designation means the treatment is applied beyond the indications studied in the FDA approval process.
Botox and Dysport units are not equivalent. A dose-conversion review in the Journal of the American Academy of Dermatology puts the commonly used ratio at approximately 2.5 to 3 Dysport units per 1 Botox unit, though the exact ratio varies by indication and site. The difference reflects the dilution and protein structure of each formulation, not a quality distinction.
The cost per session is typically comparable when accounting for the unit conversion. A higher Dysport unit count does not indicate more product in the clinical sense.
Both Botox and Dysport last approximately three to four months for most patients, consistent with FDA prescribing information and clinical retreatment data for both products. Individual variation exists: metabolism, muscle activity, and treatment history all affect duration.
Consistent treatment maintains the result. Long gaps between sessions allow the muscle to return to its baseline activity level.
The treatment area is the primary factor in the clinical recommendation. Broader diffusion makes Dysport better suited to larger surfaces; tighter localization makes Botox better suited to precision work. Individual anatomy and injector experience shape the final call.
Dysport is typically preferred for the forehead. Broader diffusion covers a larger surface with fewer injection points, producing smooth, even relaxation across the full width of the forehead.
Both Botox and Dysport are FDA-approved for glabellar lines and perform comparably here. Provider preference and the patient's prior treatment history tend to guide the choice more than any clinical advantage of one product over the other.
Botox is typically preferred near the eye. Tight localization reduces the risk that the product will affect adjacent muscles, a concern in the area around the eye where precision is critical.
For the off-label applications listed above (lip flip, brow lift, masseter jaw slimming, neck bands), neither product has a clinical advantage over the other. Technique and provider experience with each product are the deciding variables.
Common side effects for both Botox and Dysport are mild and typically resolve within a few days:
A rare but known risk with any neuromodulator injection near the brow or eye is temporary eyelid drooping (ptosis). Ptosis occurs when the product migrates to the levator palpebrae (the muscle that raises the eyelid). The drooping resolves as the product wears off. In experienced hands with appropriate dosing, the risk is low.
Because Dysport diffuses more broadly, placement near the brow requires attention to dose and injection technique. The tighter localization of Botox provides a margin of precision in sensitive areas.
Providers typically defer neuromodulator treatment during pregnancy and breastfeeding; confirm timing directly with your provider. Patients with certain neuromuscular conditions need to discuss candidacy with their provider before treatment. A consultation at Anne Therese Aesthetic Medicine includes a medical history review before any treatment is booked.
Botox and Dysport are both priced per unit, but the unit counts differ. Because Dysport requires more units per session to achieve the same effect as Botox, the invoice reflects a higher unit count. The per-unit cost of Dysport is typically lower, and total session costs tend to be comparable between the two products.
Variables that affect total cost:
A consultation at Anne Therese Aesthetic Medicine gives you a clear picture of what a treatment plan involves for your specific goals.
The recommendation is not preference-based. It comes from the injector's clinical read of four factors.
Treatment area and spread profile. The target area is usually the deciding factor. Dysport suits larger surfaces; Botox suits smaller, precise zones. The area-by-area breakdown is covered in the section above.
Muscle strength and anatomy. For moderate lines across a larger muscle group, Dysport's diffusion produces a smooth, even result. For strong, dynamic muscles that require concentrated relaxation, such as deep frown lines, Botox's precision delivers the localized effect without affecting surrounding tissue.
Patient timeline. If a patient has an upcoming event, Dysport is the practical choice: it produces visible results faster. Outside of a timing-sensitive situation, both products arrive at the same outcome within a similar window.
Patient history and response. If a patient has had consistent results with one product, there is no clinical reason to switch. If results appear to be fading faster than expected over multiple treatments, the provider may alternate between the two. The slightly different accessory proteins in each formulation mean that switching can restore responsiveness in cases where one product's effects seem to be diminishing.
At Anne Therese Aesthetic Medicine, injectable neuromodulator treatments are performed by licensed nurse practitioners and licensed injectors. Dr. Anne Therese Stubbs, MD, Founder and Medical Director, oversees all treatment protocols across all four locations.
If you are considering Botox or Dysport for the first time, or considering switching between them, a consultation at Anne Therese Aesthetic Medicine is the right starting point.
Anne Therese Aesthetic Medicine has locations in Lewis Center and Gahanna, Ohio, and Cape Coral and Bonita Springs, Florida.
Contact the location nearest you to schedule a neuromodulator consultation.
Yes. Patients switch between the two regularly, and there is no clinical reason to stay committed to one product. Some patients find that trying both helps them identify a preference. Your injector can guide the switch based on your current results and goals.
Unfortunately, how far Dysport spreads is not something the patient can control. It is a predictable property of the formulation. In the hands of an experienced injector, that spread is generally well managed, though it is never risk-free. Around the eye area, where precision matters most, the provider adjusts dosing and placement to account for it. At Anne Therese Aesthetic Medicine, conservative dosing near the eyes is standard practice regardless of which product is used.
Neither product has an advantage for first-timers. What matters most at a first appointment is arriving with a clear sense of which areas you want to address. The injector assesses your anatomy from there. A slightly more conservative dose on the first session allows the injector to observe how the face responds and build the plan from follow-up results.
A lip flip uses a small amount of neuromodulator injected along the upper lip border to relax the orbicularis oris (the muscle encircling the lip), allowing the lip to roll slightly outward and creating the appearance of more fullness without filler. It is performed off-label with either Botox or Dysport. The amount used is very small, and the technique is the primary variable.
