How to Choose Between Botox and Dysport

Part of our complete guide to Anti-Wrinkle Injections.

If you’re considering anti-wrinkle injections for the first time, you’ve likely come across two major brand names: Botox and Dysport. Both are botulinum toxin type A products that work by temporarily relaxing facial muscles to smooth dynamic wrinkles, yet they are not identical. Understanding the nuances between these two popular treatments can help you have a more informed conversation with your practitioner and feel confident in your treatment choice.

The science: What Botox and Dysport have in common

Both Botox (onabotulinumtoxinA, manufactured by Allergan) and Dysport (abobotulinumtoxinA, manufactured by Galderma) are derived from the same bacterium, Clostridium botulinum. They share the same fundamental mechanism of action: blocking the release of acetylcholine at the neuromuscular junction, which prevents targeted muscles from contracting with their usual force.

When injected into specific facial muscles responsible for dynamic wrinkles, such as the frontalis (forehead lines), corrugator supercilii (frown lines), and orbicularis oculi (crow’s feet), both products produce a temporary reduction in muscle activity that smooths overlying wrinkles.

Both products have extensive safety data, decades of clinical use, and regulatory approval for cosmetic and medical indications. Both are prescription-only medicines that must be administered by appropriately trained and qualified medical professionals. The results of both are temporary, typically lasting three to six months before muscle activity gradually returns.

Key differences between Botox and Dysport

Despite their shared mechanism, several practical differences distinguish these two products:

Molecular size and diffusion

Dysport has a smaller protein complex than Botox, which means it tends to diffuse, or spread, more readily from the injection site. This characteristic can be either advantageous or disadvantageous depending on the treatment area. For larger surface areas like the forehead, broader diffusion can provide a smoother, more even result. However, in areas requiring precise, localised treatment, greater diffusion could affect adjacent muscles unintentionally.

Botox, with its larger molecular structure, tends to stay more localised at the injection site. This makes it particularly well-suited for targeted treatments where precision is paramount, such as treating crow’s feet without affecting the muscles that support the lower eyelid.

Onset of Action

One of the most frequently cited differences is speed of onset. Dysport typically begins to show effects within two to three days, whereas Botox usually takes four to seven days to become noticeable, with full results at 14 days for both products. For patients who want faster visible results, perhaps before an upcoming event, this earlier onset may be a relevant consideration.

Dosing Units

An important technical point: Botox and Dysport units are not interchangeable. One unit of Botox does not equal one unit of Dysport. The conversion ratio is approximately 1:2.5 to 1:3, meaning a patient who typically receives 20 units of Botox for frown lines might receive 50 to 60 units of Dysport for the equivalent effect. This difference is purely about the unit measurement system and does not mean one product is stronger or that you’re receiving “more” with Dysport.

Duration of Results

Clinical studies and practitioner experience suggest broadly similar durations for both products, typically three to four months for most patients. Some studies indicate Dysport may last slightly longer in certain patients, while others show no significant difference. Individual variation plays a larger role than the product choice in determining how long results persist.

Which product might be better for you?

In practice, the choice between Botox and Dysport often comes down to several factors:

• Treatment area: Dysport’s broader diffusion may be advantageous for large areas like the forehead, while Botox’s precision may be preferred for smaller, more targeted areas.
• Previous experience: If you’ve used one product and been satisfied with the results, there may be no reason to switch. Conversely, if results have been inconsistent, trying the alternative product can sometimes yield better outcomes.
• Practitioner preference and expertise: Many experienced practitioners have a preferred product that they know intimately and achieve consistent results with. A skilled injector’s technique and experience often matter more than the specific product used.
• Onset requirements: If you need results quickly, Dysport’s faster onset may be relevant.
• Resistance: In rare cases, patients may develop antibodies to one botulinum toxin formulation, reducing its effectiveness over time. Switching to an alternative formulation can restore results.

It’s worth noting that some practitioners offer both products and can recommend the most suitable option based on your facial anatomy, treatment goals, and any previous experience with anti-wrinkle injections. During your consultation with a clinical team, we’ll discuss which product best matches your specific needs.

Safety considerations for both products

The safety profiles of Botox and Dysport are well established and broadly comparable. Common side effects include temporary redness, swelling, or bruising at injection sites, mild headache, and occasional heaviness in the treated area. These typically resolve within days.

Rare but potential complications include eyelid or brow ptosis (drooping), asymmetry, and allergic reactions. The risk of complications is significantly reduced when treatment is performed by a qualified, experienced practitioner who understands facial anatomy and uses appropriate dosing.

Both products should be avoided during pregnancy and breastfeeding, in patients with neuromuscular disorders such as myasthenia gravis, and in those with known hypersensitivity to botulinum toxin or any formulation components. Dysport specifically contains cow’s milk protein, so patients with a milk allergy should inform their practitioner.

Frequently asked questions

Can I switch from Botox to Dysport or vice versa?

Yes, switching between products is common and perfectly safe. Many patients try both to determine which they prefer. If you’re switching, it’s best to wait until the effects of your current treatment have fully worn off before trying the alternative, so you and your practitioner can accurately assess the new product’s performance.

Is one product more expensive than the other?

Per-treatment costs are generally comparable, as the different unit systems and conversion ratios mean you use more Dysport units but at a lower per-unit cost. Reputable clinics price anti-wrinkle treatments per area treated rather than per unit, which eliminates confusion around unit pricing. Always be cautious of clinics offering significantly below-market pricing, as this may indicate diluted product or inadequate practitioner training.

Will either product make my face look frozen?

The “frozen” look is a result of technique and dosing, not the product itself. Both Botox and Dysport can be administered conservatively to maintain natural facial expression while softening wrinkles. Modern aesthetic practice favours a “less is more” approach, starting with conservative doses and adjusting at a follow-up appointment if needed. Communicating your preferences clearly during your consultation helps ensure natural-looking results.

How often will I need repeat treatments?

Most patients return for anti-wrinkle injections every three to four months initially. Over time, with consistent treatment, some patients find they can extend intervals to four to six months as the targeted muscles gradually weaken from reduced use. Your practitioner will recommend a maintenance schedule based on your individual response and goals.

This article is for informational purposes only and does not constitute medical advice. Botulinum toxin treatments are prescription medicines with potential risks and side effects. Always consult a qualified medical professional before undergoing treatment. Book a consultation with a clinical team to discuss which anti-wrinkle treatment is most suitable for you.