If you think this sounds like a long waiting period, compare the speed of results to botox. While some results are noticeable after 3 or 4 days, it can take a few weeks to see maximum results. Botox Cosmetic With Dr Dean Kane Botox Brow Lift Forehead Lift Forehead To see the final results of treatment, you’ll need to wait around two weeks. How long for dysport to take effect . Factors such as, your age, and the strength of your facial muscles, will have an affect on the amount of time it takes for results to be. The results then develop and peaks at around 2 weeks when the full effects will be seen. These injections are virtually painless and one can go back to the routine work after the injection being done. How quickly does dysport start working? How long does dysport last? In some cases, the effects of dysport and all botulinum toxin products may affect areas of the body away from the injection site. This is a natural question and given that a reunion, wedding ...