Botox Cosmetic and Dysport are both prescription botulinum toxin products, but they are not interchangeable versions of the same treatment. They contain different active drug preparations, use different potency units, and have different FDA-approved cosmetic indications.
The best choice is not based on which name is more familiar. It depends on the treatment area, your anatomy, your previous response, and the plan you develop with a qualified clinician.
Botox and Dysport at a glance
Botox Cosmetic contains onabotulinumtoxinA. Dysport contains abobotulinumtoxinA. Both temporarily reduce selected muscle activity by blocking the release of acetylcholine at the neuromuscular junction.
For cosmetic treatment, both products are FDA approved for the temporary improvement of moderate to severe glabellar lines, often called frown lines, in adults who meet the labeling criteria. Botox Cosmetic also has FDA-approved cosmetic indications for moderate to severe crow’s feet, forehead lines, and platysma bands.
Approval belongs to the exact product and indication in its labeling. A use that is approved for one botulinum toxin product should not automatically be described as approved for another.
The most important difference: units are not interchangeable
Botox and Dysport are measured in product-specific units. The FDA labeling for both products states that their potency units cannot be compared with or converted into units of another botulinum toxin product.
This means a larger unit number for Dysport does not automatically mean a stronger or more aggressive treatment. It also means online conversion charts should not replace an individualized dosing decision.
Dr. Chang selects the product, dose, and injection pattern based on the labeled guidance, treatment area, muscle strength, anatomy, and treatment goal.
FDA-approved cosmetic uses
Botox Cosmetic
The current FDA labeling lists temporary improvement in the appearance of moderate to severe:
- Glabellar lines between the eyebrows
- Lateral canthal lines, commonly called crow’s feet
- Forehead lines
- Platysma bands in the neck
Dysport
The current FDA labeling lists temporary improvement in the appearance of moderate to severe glabellar lines associated with procerus and corrugator muscle activity in adults younger than 65.
Other aesthetic injection patterns may be off-label. Off-label use can be a legitimate part of medical practice, but the clinician should explain that status and discuss the reasons, alternatives, limitations, and risks.
You can review the current FDA prescribing information for Botox Cosmetic and FDA prescribing information for Dysport.
Does one start working faster?
Patients often hear that one product always begins working faster than the other. Individual onset varies, and a marketing-level comparison cannot predict your response.
The two FDA labels were developed from separate clinical programs with product-specific doses, study designs, and assessment schedules. They do not establish a universal head-to-head winner for every patient or facial area.
If treatment is being planned around a wedding, photography session, travel, or another event, allow enough time for the response to develop and for any temporary redness, swelling, or bruising to settle. Discuss timing during consultation rather than relying on a promised day-by-day result.
Does one spread more than the other?
You may see Dysport described as spreading more and Botox described as staying more localized. In practice, distribution is affected by more than the brand name. Dose, dilution, injection volume, depth, placement, muscle anatomy, and clinician technique all matter.
The treatment plan should be built for the specific muscle and desired effect. A broad statement about diffusion is not enough to choose a product safely.
How long do Botox and Dysport last?
Both treatments are temporary. The Dysport label reports improvement in glabellar lines lasting up to four months in clinical studies. For glabellar lines, the Botox Cosmetic label reports an effect lasting approximately 3 to 4 months. Your duration may be shorter or longer depending on the area treated, muscle activity, dose, prior treatment, and individual response.
For a deeper discussion of duration and retreatment timing, read How Long Does Botox Last?.
Do Botox and Dysport have the same risks?
Both products have boxed warnings about the possible distant spread of toxin effect. Symptoms can occur hours to weeks after injection and may include generalized weakness, double vision, drooping eyelids, difficulty speaking or swallowing, or difficulty breathing. Swallowing and breathing problems can be life-threatening.
Possible cosmetic-treatment effects can include injection-site pain or bruising, headache, eyelid or brow drooping, facial weakness, dry eye, or swelling. The reported adverse reactions and frequencies differ by product, indication, and clinical study.
Both products are contraindicated for people with known hypersensitivity to a botulinum toxin preparation or formulation component and when there is an infection at a proposed injection site. Dysport is also contraindicated in patients with known hypersensitivity to cow’s milk protein, and its label notes that the product may contain trace amounts. Medicines that interfere with neuromuscular transmission and certain health conditions may change risk.
Seek immediate medical care for trouble swallowing, speaking, or breathing, generalized weakness, or another severe symptom after treatment.
How Dr. Chang approaches product selection
Dr. Joseph H. Chang begins with the concern and the anatomy, not with a default brand. He assesses facial movement, brow and eyelid position, muscle strength, asymmetry, prior treatment, and the amount of expression you want to preserve.
His fellowship training in oculoplastic surgery at UCLA’s Jules Stein Eye Institute and more than 25 years of injectable experience inform treatment around the eyes and upper face. No aesthetic result can be guaranteed, but an individualized plan can address the variables that a one-size-fits-all injection map misses.
Learn more about the practice’s approach on the Botox and Dysport service page.
Questions to ask before choosing a product
Use your consultation to ask:
- Which product is being recommended, and why?
- Is the proposed treatment FDA approved for this product and area, or is it off-label?
- What changes are realistic for my anatomy?
- What risks are most relevant to the proposed injection sites?
- How will my previous response affect the plan?
- When should the result be evaluated?
- What symptoms require a call to the office or urgent care?
Provider training, product sourcing, medical assessment, and complication protocols matter more than a simplistic brand comparison.
Frequently asked questions
Are Botox and Dysport the same drug?
No. Botox Cosmetic contains onabotulinumtoxinA, while Dysport contains abobotulinumtoxinA. Both are botulinum toxin products, but their formulations, potency units, labeling, and dosing are product-specific.
Can Botox units be converted into Dysport units?
No direct conversion is established. FDA labeling states that the potency units of each product cannot be compared with or converted into units of another botulinum toxin product.
Which product works faster?
Individual onset varies. The FDA labels come from separate product-specific clinical programs and do not establish one universal head-to-head winner for every patient or treatment area.
Which product lasts longer?
Both are temporary. Duration varies by product, treatment area, dose, muscle activity, and individual response. A clinician should base retreatment timing on your response rather than a fixed promise.
Can Botox and Dysport be used for the same cosmetic areas?
Their approved cosmetic indications overlap for glabellar lines, but they are not identical. Botox Cosmetic has additional FDA-approved cosmetic indications. Other uses may be off-label and should be discussed as such.
How should I choose between Botox and Dysport?
Choose through a medical consultation that considers the treatment area, anatomy, previous response, goals, labeling, and risks. Product choice should be part of an individualized treatment plan.
Schedule a consultation
To compare Botox and Dysport for your goals, schedule a consultation with Modern Aesthetic Institute. Dr. Chang can assess your facial movement, explain the relevant labeling, and discuss a treatment plan based on your anatomy and preferences.
About Dr. Joseph H. Chang
Dr. Joseph H. Chang is an ophthalmologist with fellowship training in oculoplastic surgery at UCLA’s Jules Stein Eye Institute. He has more than 25 years of injectable experience and has served the Bakersfield community for more than 20 years.