This should not interfere with your Dysport injections. When Dysport is administered for cosmetic purposes, it is specifically injected in a given area to address the muscles causing wrinkles.
Xanax and Ambien will not affect the Dysport that is injected, as the chances that the Dysport will migrate from the area are slim. I would recommend speaking with your physician who will perform the injections regarding any guidelines they have prior to having Dysport injections. In general, it is important to avoid:
1) Ibuprofen
2) NSAIDS
3) Vitamin E
4) Fish oil
They may increase the likelihood of bruising occurring due to thinning of the blood. Thanks and I hope this helps!