Wrinkle fillers and Botox or Dysport, used together, make an excellent same-time combination treatment. While Botox and Dysport weaken harsh muscles of expression, fillers plump out wrinkles, and each magnifies the benefits of the other.
It's perfectly safe to inject Botox and fillers at the same time even in the same area. However, if you want to wait to fully evaluate the effects of your Botox treatment first, then you should wait 3 weeks. The full effects of Botox can take 3 weeks to appear.