Botox vs Dysport: What the Price Difference Really Means

The short answer

Comparing Botox and Dysport by their per-unit price is the single most misleading number in aesthetics. A Dysport unit is roughly a third the potency of a Botox unit, so a lower unit price is offset by needing about three times as many units. Ask any practice for the total treatment price for your specific area, never the per-unit rate.

Botox vs Dysport at a glance

How they actually differ

Both products are botulinum toxin type A and both work identically at the nerve terminal, blocking acetylcholine release so the muscle cannot contract. The differences are in formulation, and only two of them matter clinically.

The first is the potency scale. Allergan and Ipsen each defined their own unit against their own assay, and those assays are not interchangeable. Most injectors work at a conversion somewhere between one to two and a half and one to three — meaning roughly 30 Dysport units to do the work of a dozen Botox units. Nothing about that makes either product better value on its own; it makes the per-unit price a meaningless comparison unless you convert first. A practice advertising a cheaper unit rate for Dysport while charging by its own unit scale is quoting you a smaller unit, not a discount.

The second is diffusion. Dysport carries a smaller protein complex and spreads further from each injection point. On a broad flat area like the forehead, that spread is an advantage — fewer injection points, smoother result, less risk of untreated bands between points. Around the eyes, at the brow tail, or on a lip flip, it is a liability, because unintended spread into a neighbouring muscle is exactly what produces a dropped brow or an odd smile. Skilled injectors exploit this deliberately, choosing product by area rather than by preference.

Onset differs slightly in Dysport's favour — many patients notice movement change within a day or two, against two to three days for Botox — but both reach full effect around two weeks and both wear off on a comparable three to four month schedule. Claims that one lasts substantially longer than the other do not hold up consistently across areas or patients.

What each one costs

Neurotoxin in our sample is priced at a median of $11 per unit across 5 practices, with quotes clustered tightly between $10 and $11.50. That tight band is itself informative: per-unit pricing does not vary much, so it is not where the difference between two quotes comes from. The difference comes from how many units the injector uses and which product's unit scale is being counted.

This is why the only useful question is total price for your treated area. A practice quoting Dysport at a lower unit rate and then using close to three times the units will land at a similar total, or occasionally higher. A practice quoting a flat per-area price has already done the conversion for you, which is usually the more honest structure. Watch for two specific traps: unit rates advertised without naming the product, and injectors who under-dose to keep a quote attractive, which produces a weak result and an early return visit you also pay for.

Who should choose which

Choose Dysport if your main concern is the forehead or the glabellar lines between the brows, if you have a broad treatment area, or if you want the fastest visible onset before an event in a few days. Its wider spread means fewer injection points and a more evenly relaxed result across a flat plane, and injectors treating large male foreheads often prefer it for exactly that reason.

Choose Botox if the work is precise or close to a muscle you do not want affected: crow's feet, brow shaping, a lip flip, masseter slimming, or a first treatment where you want to see a conservative result before committing. Its tighter diffusion makes the outcome more predictable in tight anatomy. If you have had either product before and were happy, the strongest argument is simply to stay with what worked — the small number of people who develop resistance-like non-response to one product may respond to the other, but that is a reason to switch after a failure, not before one.