I get this question in consultation more than almost any other. Patients come in having done their research — they've read the Reddit threads, watched the YouTube comparisons, and they want to know: which one is better? The honest answer is that neither is universally better. They are different tools, and the right choice depends on the patient, the area being treated, and the injector's experience with each product.

The Basics

Both Botox (onabotulinumtoxinA) and Dysport (abobotulinumtoxinA) are formulations of botulinum toxin type A. They work by the same mechanism: blocking the release of acetylcholine at the neuromuscular junction, which prevents the targeted muscle from contracting. The result is a temporary relaxation of the muscle, which softens the overlying skin and reduces the appearance of dynamic wrinkles — lines that form from repeated facial movement.

The key differences lie in the protein complex surrounding the toxin, the dilution ratio, the diffusion pattern, and the onset and duration of effect. These differences are clinically meaningful, and they inform how I approach treatment planning for each patient.

Onset and Duration

Dysport tends to have a faster onset than Botox — many patients notice results within 2–3 days, compared to 4–7 days for Botox. This is not a universal finding, and individual variation is significant, but it is a pattern I observe consistently in my practice. Duration is comparable for most patients — typically 3 to 4 months — though some patients report slightly longer duration with Botox.

Diffusion and Spread

This is the most clinically significant difference. Dysport has a larger diffusion radius than Botox — it spreads more from the injection point. This is an advantage in large, flat muscle groups like the forehead, where broader coverage is desirable. It is a disadvantage in areas where precision is critical — around the eyes, the lip border, or the brow — where unintended spread can cause ptosis (drooping) or asymmetry.

In my practice, I often use Dysport for forehead lines and glabellar lines (the "11s" between the brows) in patients who want a softer, more diffuse result. For crow's feet, brow lifting, lip lines, and any area requiring precise placement, I typically prefer Botox.

The injector matters more than the product. A skilled injector with Dysport will outperform an inexperienced injector with Botox every time.

— Samuel Olaleye, MD

Dosing and Units

Dysport units are not equivalent to Botox units. The conversion ratio is approximately 2.5:1 to 3:1 — meaning 50–75 units of Dysport is roughly equivalent to 20 units of Botox. This is a source of confusion for patients comparing prices. When evaluating cost, always compare by treatment area and expected result, not by unit count.

At The Skin Parlor™, Botox is priced at $10 per unit and Dysport at $4.25 per unit. A typical forehead and glabellar treatment requires 20–40 Botox units or 50–100 Dysport units, depending on muscle mass and desired effect. Your physician will recommend the appropriate product and dosage during consultation.

Which One Is Right for You?

The answer depends on your anatomy, your treatment goals, and your history with neuromodulators. If you've had Botox before and been happy with the results, there's no compelling reason to switch. If you've found that Botox wears off quickly, or that you need higher doses to achieve your desired effect, Dysport may be worth exploring. If you're new to neuromodulators, I typically start with Botox because the dosing is more predictable and the diffusion is more controlled.

The most important factor in your outcome is not the product — it's the injector. Understanding facial anatomy, muscle dynamics, and the nuances of each patient's face is what separates a natural, beautiful result from one that looks overdone or uneven. That's what we bring to every treatment at The Skin Parlor™.