Eighty-seven percent of people given Dysport reported a reduction in wrinkles, compared

to five percent taking placebos who reported an improvement.

An independent assessment showed improvement among 85 percent of patients receiving Dysport, compared with three percent of patients receiving the placebo.

It was found that Dysport took effect as quickly as 24 hours, with the median time about four days.

The study also confirmed that dosing should be adjusted according to a person's facial

muscle mass. Participants with the smallest muscle mass had the largest response (96

percent) by 30 days.

That rate dropped as low as 80 percent in people with the highest facial muscle mass.

The study will appear in Plastic and Reconstructive Surgery.