Botox dosage VS Dysport dosage?

The conversion I use is 2.5 units of Dysport to 1 unit of Botox. So multiply the Botox units by 2.5 to get a good starting point for Dysport dose that will be required for a similar effect.

Botox comes in 50U and 100U bottles. Dysport comes in 300U bottles. Assuming the Botox and Dysport are diluted equally (with 3 ccs of sterile saline) and the mixture is fresh, there is 1U of Botox for every 3U of Dysport.25U B = 75U D and you received more: 100U D to jaw 37.5 B = 81.5 D and you received less: 70U D to forehead, 40U glabellar, 50U crows feet Consult a Board Certified Plastic SurgeonA recent study - Based on a triple blind study conducted by triple board certified, celebrity plastic surgeon Dr. Ramtin Kassir, a test of the efficacy and safety of popular injectables, brand named "Botox" and "Dysport;" it is now affirmed that Dysport delivers faster and longer lasting results than other comparative botulinum toxins.I don't believe this study was a randomized, double blind, prospective study so take it for what its worth.

I like to use a 4 Dysport Units  to 1 Botox unit.  Most of my patients who have used both feel that they get a little faster onset and longer duration with a dose higher than the 2.5 to 1 conversion. 

There is no perfect answer to this question.  However, most people get a near equivalent result using 2.5 units of Dysport where they would have used 1 unit of Botox.  You are getting Dysport at 4 times the Botox units in your Jaw, so I would expect a stronger result with Dysport.